Didn't the 70's & 80's Buicks have 272 rearends running the big block 455's? I think the 5-lug wheels on them were the same as 5-lug Chevy trucks too. You'd still have to do some fab work to adapt the axle and your wheels are probably 6 lug...but, to really cruise effortlessly without a lot of power...a 272 or 307/08 would really be the way to go. Probably gets gobbs better mileage too. That's my 2 cents...Jim
