400/450 stroker....Cheap parts, lotta work.
We had gaps in the neighborhood of .030" before the filing. The manifold bolt holes are a little low now but we have no gasket in there yet. The left side of the manifold now shows a .012" gap at the bottom and tight at the top. The right side has a .015" gap at the top and tight at the bottom. Now to set up in the mill and square everything up. The tin valley pan is only .015" thick so after the milling process we may need to use a fiber gasket to go along with the valley pan in order for the bolt holes to align centered.
Yes they need to be centered. The manifold and heads were gasket matched with the bolt holes centered.
We had gaps in the neighborhood of .030" before the filing. The manifold bolt holes are a little low now but we have no gasket in there yet. The left side of the manifold now shows a .012" gap at the bottom and tight at the top. The right side has a .015" gap at the top and tight at the bottom. Now to set up in the mill and square everything up. The tin valley pan is only .015" thick so after the milling process we may need to use a fiber gasket to go along with the valley pan in order for the bolt holes to align centered.
Yes they need to be centered. The manifold and heads were gasket matched with the bolt holes centered.