Inliners International Forums General Discussion Drive Train Sm465 to a Gmc 302

I'm trying to mount a sm465 10 spline to a Gmc 302.
I have a bellhouseing and flywheel that is off of a 1956 Gmc 270. I know that I have to get the retainer hole inlarged for it to work. The problem I see is the 270 housing is deeper buy about 1/2" compared to the one that was on the sm465. Will the input shaft on the trans be to short? Or is there a way to make work?

Thanks for the advice,W