Pontiac 400 Exhaust maifold gasket

[68 Vert]

Don't forget the '71-'72 455 HO round port engines.

[jasonL78]

Awesome that is just what I was looking for. The owner drove the car into my garage and shut it off. When I got it on the lift I new it was going to need an exhaust. Well I installed a new exhaust started it up and exhaust manifold leaks both sides. I was able to drop the passenger side down to get this one out. The driver side is going to be tricky. The Z-bar is in the way of the back bolt on drivers side. The drivers side is stuffed in there. So if I had taken the manifold all the way out I would have seen that D port. Thanks for the pictures greatly appreciated.

[StealthBird]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 68 Vert</div><div class="ubbcode-body">Don't forget the '71-'72 455 HO round port engines. </div></div>

Yes, and I forgot the 1971-1972 455 H.O.'s.

[jasonL78]

Guys what gaskets are you using on these 400 TA manifolds. I changed them out with stock looking fel-pro and the driver side is still leaking. I removed the manifold today cleaned up the face of manifold. Using a straight edge it looks like the manifold is warped. The center port is lower than they the two outside ports. So I tried to get them square to each other. But after I installed the manifold it still is leaking on the center port. So do they make a thicker gasket for these pontiac manifolds?