I have been thinking about Trailblazer SS manifolds. I did some searching and found part numbers. They are supposed fit almost any frame from 60's to 80's.
12600526 MANIFOLD. Engine Exhaust Manifold - LH. Required: 01LHD.
12600527 MANIFOLD. Engine Exhaust Manifold - RH. Required: 01RHD.
LINK to data page.
www.GMPartsDirect.com
Left Side: $51.18
Right Side: $48.49
Please feel free to ADD PICTURES.
I would like to see some installed on 67-72 4x4 trucks....