I have a well-preserved G-body. It's an 85 Buick T-Type Regal. Bought it super low mile and hurt in 94, and preserved it. I've cocoon'd it since. It's so sweet. I also have a built 69 98 low mileage 455, 50k original miles, taken apart, scratched the cylinders, cleaned it, put it back together with new parts and the original 10.25 advertised pistons, and a peppy flat tappet cam (Mark), hv oil pump and big pan, pro-comp heads with a little extra porting by me, Performer intake, etc. I have a rebuilt Buick 800 q-jet.

Which American Racing Headers should I get? 1-7/8" primary x 3" venturied collector outlet, or 2" primary x 3.5" venturies collector outlet? I will use a crossover x pipe, and tailpipes and mufflers are 3".

 

The Oldsmobly will grow over time. I'll just get the 2 by 3.5. Thanks