Hello, for manual Transmission the GS 1970.71,72 what model comes with M21 and what model comes with M22? like 455 stage 1 1970? Thanks
No Buick used the M22. 70 4 speeds were M21s. The fact that it is a stage one changed the model auto trans used but not the 4 speed used. A 70 GS 350 used the same 4 speed trans that was used in a 70 GS 455 stage 1.
