429 engine swap into an 03

[merc100maker]

I have been blessed with finally finding a 429 thunderjet and want to shoehorn that beast into my 03 Marauder with the long term goal to transform into a 56 Mercury M100. But that is another time in another thread... My question for now is has someone put a 429 in this car and what was used to marry the motor to the 03 trans? Also, is there any issues with the computer that I may not be factoring in? I’m sooo excited to finally see this project start!

[RubberCtyRauder]

I don't think the PCM is going to run it. You prolly will need a different trans. I see alot of trial and error and Fab work in the future in my opinion

[kirk]

I like it!

We already have a 69/70 Marauder on an 03 chassis, why not an 03 with an X-100 drive-train?

I'm sure it can be done. As said already, probably lots of fab work. Twenty some years ago I saw an article on a Thunderbird Turbo Coupe with a 427 SOHC and they used a stock hood. Thing looked stock! If they could put a cammer in a T-bird I'm sure you could do a 429 in a gen 4 Marauder.

[NXSBOB]

I have been blessed with finally finding a 429 thunderjet and want to shoehorn that beast into my 03 Marauder with the long term goal to transform into a 56 Mercury M100. But that is another time in another thread... My question for now is has someone put a 429 in this car and what was used to marry the motor to the 03 trans? Also, is there any issues with the computer that I may not be factoring in? I’m sooo excited to finally see this project start!

Man i wish the prices were that low here... I just filled my Marauder for 95 dollars at 1.50 per Litre... (5.66 Per Gallon)
It will burn twice as much gas with the 429.

[Joe Walsh]

It will burn twice as much gas with the 429.

If you are putting a Big Block in anything, you probably aren't (and certainly shouldn't be) worried about the gas mileage.
If its your DD...then a Big Block is sheer lunacy.

Guess how many MPG my 427 Cobra gets?
I have no Ef-in idea!
I do know that when the second Holley opens up, the gas gauge goes down almost as quickly as the Tach goes up....:eek:

[NXSBOB]

If you are putting a Big Block in anything, you probably aren't (and certainly shouldn't be) worried about the gas mileage.
If its your DD...then a Big Block is sheer lunacy.

Guess how many MPG my 427 Cobra gets?
I have no Ef-in idea!
I do know that when the second Holley opens up, the gas gauge goes down almost as quickly as the Tach goes up....:eek:

I agree, but he posted this:

Man i wish the prices were that low here... I just filled my Marauder for 95 dollars at 1.50 per Litre... (5.66 Per Gallon)

[69marquis conv]

Don't forget to factor in the weight difference between the DOHC 4.6 and the iron 429. You won't need to cut a coil if you're going for some rake in the stance.

[1stMerc]

Guess how many MPG my 427 Cobra gets?
I have no Ef-in idea!
I do know that when the second Holley opens up, the gas gauge goes down almost as quickly as the Tach goes up....:eek:

Now that there is funny as heck!!!

[Marauderjack]

I do know that when the second Holley opens up, the gas gauge goes down almost as quickly as the Tach goes up....:eek:

And you SCREAM like a little GURL!!:eek::eek:

[Zack]

Wishing you the best if you even think the factory trans will work with that engine.
Good luck

[TORINO]

You will need a rear sump oil pan and even with that the oil pump is still in the front.Will the engine sit low enough ? A 4r70w trans unless modified will never take the close to 500 lb of torque you will have. Just put in a c6 behind the 429 but is the tunnel bug enough? You can always cut the floor out and move the engine back it will also handle better.You see it on tv all the time just cut and weld until it fits.You will get a nice 10mpg. Easy to figure mileage you need 10 gal for ever 100 miles you drive.

[justbob]

You will need a rear sump oil pan and even with that the oil pump is still in the front.Will the engine sit low enough ? A 4r70w trans unless modified will never take the close to 500 lb of torque you will have. Just put in a c6 behind the 429 but is the tunnel bug enough? You can always cut the floor out and move the engine back it will also handle better.You see it on tv all the time just cut and weld until it fits.You will get a nice 10mpg. Easy to figure mileage you need 10 gal for ever 100 miles you drive.



Like I did? LOL

Just metal. Make it how you need it or simply put it back..

https://uploads.tapatalk-cdn.com/20181013/99fe8dddac2448368bf6ab65e79615 f0.jpg

Before seam sealer and dynamat.

https://uploads.tapatalk-cdn.com/20181013/5dcb5dc3e10d8c4f06a1c002f4a39e f3.jpg
https://uploads.tapatalk-cdn.com/20181013/8ea130faf7a459658ccbf6733ce198 cd.jpg

You can stuff in whatever you want if you can fabricate.. But if you have to ask, then might be best if you don’t start hacking.


Sent from my iPhone using Tapatalk Pro

[PHHHHTT]

Just as an FYI, if you do decide to go with a C6 transmission, the C6 supplied with Cobra Jet 429's and early Lincoln 460's had 5 clutch packs instead of the usual 3 clutch packs. Many years ago, I when had my Torino Cobra C6 trans rebuilt, the tech who did the work relayed to me this info. He had to open another trans kit to get the additional clutch parts to finish repairing mine.

[71cyclone]

This is correct. My C-6 in my Mark III was rebuilt last year and it had the additional clutches, also the Lincoln 9" is larger than the other 9" ford products. I am getting better milage by replacing the factory motorcraft 615 cfm with a 'Quick Fuel 750 Cfm . 15 to 16 mpg on the hi-way now.Resenators and 1-7/8" pipes removed and now matched with the rest of the 2-1/2 "system.

[merc100maker]

Thanks for all of the replies! It’s going to be an adventure, will keep everyone posted as things progress.

[daddyusmaximus]

Sounds like an ambitious, yet very cool project.

[Joe Walsh]

I have been blessed with finally finding a 429 thunderjet and want to shoehorn that beast into my 03 Marauder.


Don't forget to factor in the weight difference between the DOHC 4.6 and the iron 429. You won't need to cut a coil if you're going for some rake in the stance.

Yes,
A good set of aluminum heads and intake for your '385' series would:
Add 100+ HP
Drop 100+ Lbs

:hmmm: .... Don't forget a 4.30" stroker crank to make it a 521 ThunderJet! :awe:




.

[decipha]

well first off I hope you are aware that swapping in a stock unmodified 429 will just make the car slower.

the 429 is not much different than any other engine swap when you know you have to fab mounts and modify things to make it work, it should be pretty straight forward

one thing to note, if the engine hasn't been gone through then there's that. Just expect to have to go through the engine before tossing it in.

the stock marauder ecu can run that engine perfectly fine, if you have any issues just LMK I can get you squared away with no problem I've run several big blocks on the stock ecu's over the years

you will need to fabricate a 35 tooth reluctor to the front of the engine same as the stock marauder engine uses, you will have to sacrifice a distributor and fab up a single tang with a VR cam sensor but thats no big deal.

Take the stock coil on plugs from the marauder engine and rip the boots off. Get a set of ls1 plug wires and you can clip them on to the stock CoPs which will give you coil near plug. If you want to get fancy you can take an ls3 coil bracket that mounts to the valve covers and make that work or just make one. Or just secure them out of the way.

You will have to drill injector bungs in the intake and make a fuel rail fit. I usually use the edelbrock fuel rails since they are nice and cheap and just drill bosses in the manifold and weld in a bung to secure the injectors. You'll have to make a mount for the rails which is as simple as modifying the edelbrock mounts or use an L bracket. You will need a ford FRPS adapter to re-use the stock FRP sensor. The stock marauder fuel injectors will work perfectly fine.

Rip the carb off and toss an edelbrock 4150 adapter elbow on it. You can get the ultra low profile elbow and use a 3/4" spacer to give you more clearance to help clear the hood. The stock marauder maf will work fine no problem.

Prob should factor in a raised hood or modified hood at the least though.

you will prob have some issues with the exhaust manifolds. Your only option may be to flip the forward and route them down and around to mate back up with the exhaust.

For the accessories you will most likely have to redrill and modify the original bracketry and most like fab up some mounts. Should be pretty straight forward.

The ac lines are going to have to get redone. Any competent hose shop can fab you up some new ones.

most likely your going to run in to some issues with wire length and maybe some wiring harnesses on the driver side may get in the way. Factor in having to extend some wiring and moving others.

The stock fan and shroud is probably going to give you some issues with clearance. I swapped a 2018 mustang fan on my marauder to gain additional clearance. Just to need to make some mounts for the fan which is nothing special.

The stock marauder trans can handle anything that engine can produce with no problem I've put much more through them than what that engine will make. The bellhousing is not the same though on the modular as the big block. Its a bit involved to swap the bellhousing but it can be done if you have a competent machine shop that can cut the case and align a swap bell-housing to it. You will have to tear the trans down to cut the case and weld up new replace-able bell-housing attachments.

https://www.cjponyparts.com/performance-automatic-bellhousing-sfi-pro-fit-big-block-aode-4r70w/p/BELL19/

[daddyusmaximus]

^^^ That's some interesting thinking using the Marauder's fuel injection system...