[70GMCer]

I know when I did my swap, I already had a 350 engine in mine w/3spd manual. The 350 turbo I used was the short shaft and hooked right into the drive shaft without any shortening. I think with the long shaft turbo, you will need to cut the drive shaft down, or get a short tail shaft for the trans. It would be cheaper to get the short shaft at a junk yard. Easy change. Someone else can chime in on this. While you're at it, check your speedo gears to make sure your speedometer will be correct.