Originally posted by orange crush
I changed over to soft copper gaskets cost about $25.00 at a swap meet . had the best luck with theses.
on my street rod I figured that I would spend a little more for the convience of not having any problems sealing the block huggers with there 3/8 flange and I used copper, I did retighten them a couple of times so for so good though. On my el camino daily driver I left the cast iron header on not as efficient but used regular gasket felpro and no leaks at all. My boys was so tired of fighting his headers that he encouraged me to just go with the cast iron headers and for his truck we are looking for a set of corvette rams horns and get rid of the headers that came with the truck cheapies plus can't get acces to all the plugs. At least the try y's are quality on his other chevy 70 pu. Ed ke6bnl