T-5's and input needed

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I'm trying to figure out how to preceed with finishing up my close ratio T-5 gear swap in the American along with starting on the Convert. I have a T-4 to put in the American to keep it mobile while I do this gear swap as I want to use the AMC case and such to maintain my shifter placement. The AMC placement is different from all other T-5's!
   What I have is two sets of used Camaro gears. One brand new factory Ford NOS cluster. What I need is an input and an overhaul kit. What I can't decide on is how to go with the input! The 83-84 Non world class input is no longer made and I can't find one for less then $135 with shipping. I can get a Camaro input for $54.00 I need to buy a clutch disc anyway so I'm thinking of going with the Camaro input. The problem is it is about 5/8"-3/4" shorter than the Ford input. I think I can get away with this by using a pilot bushing that is deeper than normal and protudes from the crank. I'm not sure however. There are several things that make me think this will work. Right now I have a pilot bushing mounted in my 4.0L's second step hole that is farther into the crank than the original pilot bearing rides. I had a bushing turned down with a shoulder left on it to keep it from seating all the way and leaves it about 1/4" back. This allows the T-5 input to engage by about 3/8". Enough that it has not seemed to cause any problems. So I'm thinking if I go to the regular 4.0L bearing that it will move the whole bushing back by close to the amount the Camaro input is shorter. If that fails I will have a thicker busing made.
   Has anyone ever tried to use a Camaro T-5 input behind the AMC engines? Does anyone know why this won't work? One othe reason I'm leaning this way is that when you look at the true High performance manual transmissions they always move to the fine spline the Camaro uses. So why not go that way since it is cheaper? I know this is a non-world class trans I'm building.
  I don't care , so please lets not wander off in that direction!

Thanks,
--
Mark Price
markprice242ATadelphia.net
Morgantown, WV