I am interested in hearing how you guys get around the high compression (11+/1 ratio)- low octane fuel problem. Do you modify the engine, such as install lower compression pistons or installer thicker head gasket, or do you run a fuel additive or have a source for higher octane fuel such as aviation fuel?
I have just pulled down the 427 (casting no.3963512, closed chamer heads, standard holley and winters manifold)I intend using in my 67. It was built as a race motor for a 68 vette and has not been run since the mid 70,s. On the whole it is in excellent condition and probably could be run as is....but it will need some modification for the street and modern fuels so if anybody has similar experience I would greatful for some advice.I have attached a photo of a piston.....anybodyseen pistons with this pattern embossed into the skirt before
