1966-300
New Member
Hi guys me again. Still rebuilding my 383 and so far so good. Block and heads at the machine shop now going .30 over, and putting in a Comp Cam. My question is this. While tearing down the motor there was some insulation material under the intake manifold between it and the valey pan gasket, it looks as if it was factory installed. I have been told it is there to prevent the fuel from getting too hot vaporizing from the carb. Has anyone else seen this during a rebuild, and where may one get some of this insulation?