Issue with Ford 460 clutch
I have a issue with a clutch in a 78 F250 that has a 460 4 speed manual transmission. When I start the engine there is a metal to metal noise coming out of the bell housing. When I push in the clutch the noise gets alot quieter but the noise is still there. If I put a breaker bar on the harmonic balancer and turn the motor over by hand, the motor will spin freely until one point in 360 degrees of rotation, then it gets real tight. I bought this truck with a seized up engine and replaced it with a running 460 out of a 77 Lincoln. The truck originally had a 400 and somebody in the past installed a 460. The clutch was a 11" diaphragm unit and the flywheel was from a 69 390 FE engine. The replacement clutch I used was a 12" long for a 460 engine. I measured everything before I installed the engine and everything was ok. The clutch bolted up to the flywheel without a problem though the throwout bearing was taller with the 12" clutch. The only thing I can think of is maybe the pilot bushing I installed was wrong. The 12" clutch kit came with two pilot bearings. One of them fit in the back of the crank and was smaller in diameter. The larger pilot bushing fit up on the front of the crank by the flywheel. Could it be possible that the input shaft is not in the pilot bushing????Any help would be appreciated, Thanks.