I did a 3.4 swap and am very happy. Ed Mc has all the info you could ever need on a 3.4 swap.

The 3.8 Buick has the B-O-P bolt pattern, would need a different tranny / t-case. GM 3800 series shares the 60* bolt pattern. But requires much more work, 3800 has been done supercharged!

Welcome to the 4x4wire smile


Curt B 89RS Calmini Header Delta Cam 33x10.5 BFG MTs & 90 Trooper 3.4 v6, SAS D44 ARB/Hobart 5.38s 35s my pictures