Any truth to using a Mach 1 valve body to stiffen shifts?
I'm fairly leery of cracking the tranny, but need to stiffen the shifts since I installed the 3500 stall. You know how if it ain't broke, don't fix it. With my luck I'll crack the tranny and less than 5k later it will go kaplooey!
I have the J-mod directions, but feel uncomfortable drilling in the tranny. See above sentance.