[joedoh]

nice score. you can tell its a vette trans by a big V cast in the bellhousing, it uses a different valve body.

the tailshaft is shorter, like you have found, because the vette doesnt need any slip for the driveshaft yoke to move in and out as the rear suspension moves up and down, because the C4 vette has an IRS with a solidly mounted pumpkin that doesnt move. the vette tailshaft wont have a place for a normal mounting pad on it, it has a mount on the side that goes to a beam that goes all the way back to the pumpkin.

if it were me, I would use a vette tailshaft and just fab a lower mount to a poly bushing. I dont think using a truck tailshaft will allow the rear seal to, seal. if you know someone who can do welding on cast aluminum you could maybe shorten a truck tailshaft.

never give up. thats puffin talk.