the swap from 3.1 to a 3.8 isnt that bad, its just time consuming, so if you dont rush things and take your time doing the swap it will be good

thanks,

boost that TBC (Tiny Block Chevy), or swap to a Blown 3800. Failing that, see if you can bolt a 4300 to your bell housing/4T60E case. the 4.3 liter is the three-quarter 350, after all.

Or, better yet, get the GXP's 327 and tranny. Then blow or boost that bad boy.

With a little ingenuity you could build a turbo setup for that 3.1 ,if you can weld the hard parts are not that difficult to build just find someone to do your tuning and you'll be golden.Chico(pops)