I have a couple of questions about The MLS Mr Gasket Head gaskets for Big blocks.
Summit shows a 4.414 mls but says for siamease block.
Then they show a 4.375 for RB.
What is the differance ? Can they be drilled to work?
I am building a 451 with a 400 block tha is .010 over and has some cylinders with large chamfer.
The 1009 felpro looks like it will hang over .
Would like to to put a race gasket on and not have to change the Ra finish on the heads or block.
Any body have experiance with the Mr Gasket MLS?
Thanks .