Thank you for sharing all of those pictures. That really drives the point home. It's been a long while since I had a close look at a 4v head and intake (I used to have an M-code '71 Cougar convert). I forgot that the top of the 4v ports is also quite a bit higher as well as lower than the 2v port. That 2v gasket is a huge mismatch on the A3 intake.
Is it typical that the A3 intakes have such narrow ports or is yours possibly the Roush A331 casting?
I saw a picture recently of an Edelbrock casting of the A331 (unported) and it looked like the port size and shape almost perfectly matched the A3 head.
quote:Originally posted by George P:
Here's the A331 manifold compared to a 4V intake gasket. The manifold's runners are just "a bit" higher than the top of the gasket.