Hardest part is the clutch pedal and associated linkage BS. There are more T-5 swap parts out there then for the Tremec so the T-5 would get the nod for me. I helped put a T-5 in a buddys 68 Falcon. It was allready a 3-speed manual but it was still well worth it. Made the car a lot more fun.
I converted my Mach 1 from C-6 to toploader 4-speed and love it. Hard on drivers side motor mounts though.
I just finished a c4 to t-5 conversion, and the hardest part was the cable clutch install. Now the clutch works good but I can't use the wipers at the same time as pressing the clutch because the arm from the motor touches the cable, waiting till it gets a little warmer to tackle that.
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more!