i am installing a stock exhaust on a '68 400 non-HO. i have not been able to find the correct exhaust manifold gasket p/n's nor the bolt size/length in the illustrated parts books - anyone know what the correct bolts and gaskets are? Also, I see there is a conical seat cast into the exhaust manifold outlets and the ehaust down pipes have matching seats and I don't see a call out for any gasket. I am used to the donuts providing the seal - anyone have any issues with getting the down pipe to seal on the manifold when using the stock two bolt flange? Thanks
