People
I'm at the end of my rope here. I have a 302 with Dart Pro 1 alloy heads that have been slightly ported. Using Patriot H8420 'clippster' shorty headers.
On first install, all was good. But, after about 100 miles the kerb side rear (either #7 or 8) started leaking.
I have done nearly everything I can to rectify it; multi layer gaskets, fitting 2 gaskets, cutting the mount flange to allow them to move independently, milling the mount faces, screwing them on with nearly a breaker bar. There's no tension in the system, headers are bolted up then exhaust pipe bolted on, the system was fabricated from the headers back when the headers were bolted on.
Is this a common issue? The offside set are fine as are the 2 front cylinders on the kerb side. I am thinking it is the headers and not the heads, due to the fact that no other port is leaking.
Any new set I put on are going to cost a shiite load and I'd prefer not to waste money just trying stuff.