So many people order the wrong or low quality stuff, so here is the best of the best to get the job done:

Ford Parts:
1R3Z-6L253-BA Right Arm
1R3Z-6L253-AA Left Arm
1R3Z-6M256-AA Left Guide
2C5Z-6K297-AA Right Guide

Remaining parts you can get from Rock Auto in one purchase:
Cloyes 95338 Left Steel Tensioner
Cloyes 95339 Right Steel Tensioner
FelPro VS50477R Cam Cover gasket set
FelPro TCS45980 Timing cover Gasket set w/crank seal

If your car has high mileage, you should inspect the upper manifold gasket before re-installing.