Quote:
Originally Posted by 55 Chevy
The bore size on a new # 3995633 is 3.980. This gasket was used for the 307 motor,is steel shim & has a coating on it.
As far as I know G.M. has discontinued this gasket.
Not sure of the Fel Pro cross over #.
There are a couple of smaller bore gaskets G.M. # 14085906@ 3.875 & # 462690@ 3.875. They are both steel shim & have no coating on them.Also no longer available.
Just curious,what is the exact bore size of your motor?
Allan
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I am building a 307 .060 over. 3.935 is my bore size, so that GM #3995633 would be perfect, but if it is not avaliable then I will have to find a gasket with similar specs.
In case anyone is curious, I found the Fel-pro replacement head gasket for the 307 GM#3995633. It is a Fel-Pro #7733SH1 and it is the same except the bore size is 4.100.
Myron, do you run the 0W-30? and how does the Amsoil racing oil compare...I didn't see a 0W-30 racing oil?