Ok, lets start off with what i have. I have a 1966 mustang, 289 with a 3 speed in it. I have gotten a 1986.5-1989 T5. I am useing the T5 bellhouseing, and have put the fulcrum spacer on it, as well as the old 3speed fork so i belive the bellhousing is good to go. The clutch and pressure plate seemed to be fine and i have a stock engine, (other than headers and an intake manifold), so i am just using the same clutch and pressure plate. I did however get a new throw out bearing (one that is a replacement for the 289 3speed, right, right?) I did not pull the engine, i have the car on jack stands, and am putting the tranny in from underneath. OK, i got the bellhousing on the engine just fine, my plan was to mount the bellhousing, then put the tanny on after that, should i put the bellhousing on the tranny, then mount all of on the engine? Ok, but this is what happened: After i got the bellhousing mounted on the engine i lifted the tranny up to put it on the bellhousing, but it wouldnt go all the way in. It would go in all but like 3/4"-1". The yoke on the tranny wont move, so i do have engagement, but i have tryed wiggleing a lot but to no avail. I removed the tranny several times and made sure the throw out bearing was properaly lined up, and it was and tryed to put the trany in like 6 times but the same thing kept on happening. I was thinking about cutting the input shaft an inch, but i dont think you need to, and i still dont even know if it would fix my problem, mabye make it worse! well any help is greatly needed!!! THANK YOU FOR ANY HELP.