Exhausted with Header Leaks
look at the pattern the blown gasket has, it will tell you where its leaking. Buck says its at the bottom as in the header O-ring flange is off the bottom of the 318 exhaust port. I had a set of Hooker SC's and could not get them sealed. turns out the ports were 318 size and the heads were 340's never sealed on the bottom. Look at Treblings post on this, hit the nail on the head. Those stupid ground O-ring headers (SC's included) have a good chance of not lining up on a 318 head if they are made to mate up to a 360. question on head exhaust port size
look at the pattern the blown gasket has, it will tell you where its leaking. Buck says its at the bottom as in the header O-ring flange is off the bottom of the 318 exhaust port. I had a set of Hooker SC's and could not get them sealed. turns out the ports were 318 size and the heads were 340's never sealed on the bottom. Look at Treblings post on this, hit the nail on the head. Those stupid ground O-ring headers (SC's included) have a good chance of not lining up on a 318 head if they are made to mate up to a 360. question on head exhaust port size
