Hadnt made much progress in a while. I just finished putting the 352fe in the merc. Guys coming get that this week and in the process of putting the 4.6dohc in the 66 F100. Today i found time to finish the measurements on the rearend. I ordered a mosser eng 8.75 housing and axle package. 51inch hub to hub was the final length i settled on. about 6inches shorter than stock. The rear suspension should arrive this week, 4link and brackets.