Have you thought about installing a T5 but were confused with all the info?

[chevyguyase]

Right OldCrow, all I did was take a large pipe cutter and slowly turned it on the bearing retainer until it popped off but others are grinding it off, drilled out the mounting holes to 1/2 inch, trimmed the pilot bearing snout and that's all I did to the trans. I have a '54 3100 6cyl short bed. I took out a 4 speed granny gear trans. If you get a 14 splined shaft an 11" Astro van clutch disk should work for you. You are correct the trans will bolt up but the splines will push the disk up against the flywheel and you can't disengage the clutch. All I had to do to the clutch disk was counter sink the hub on the trans side about a 1/4 inch. I put the trans in with a couple of bolts with just the flywheel to make sure I could turn the input shaft with the disk by hand. Hope this saves you some time.