[77 TRASHCAN]

Originally Posted by Skip Fix

So did you?

I had seen the SD dyno before. So much for RA/HO/SD manifold as good as headers!

So...Is this comparison with stock "RA" manifolds, or the "opened up" version that RARE sells???

There's a good article on the SD Performance website, under tech tips. Dave built a slightly unusual stroked 400 (to 496 cubes). It was tested with RA manifolds and headers. On this particular engine, the power difference was only slight. It was a pretty cool build!!!