cuda dad
Well-Known Member
I'm replacing the headers on my 1970 340 HP with the correct manifolds. Regarding the 1/2 rounded (convex) spacers on the manifold bolts and studs, does the flat part go to the nut or the manifold?
That makes sense, thanks!Flat goes towards the manifold. They are made that way to spread the clamping force of the nut over a larger area.