Quote:
Originally Posted by BRENT in 10-uh-C
It is mine & several other's opinion that the 1.500" Model-A exhaust valve & port is too large which cuts down on the scavenging effect it can have. Also, I tend to take the stance that most stock intake seats are damaged enough where a seat insert is necessary to have a good valve support. For the same labor expense, I can increase the seat area to support a 1.750" valve instead of cutting and installing a 1.625" seat insert (-which holds the 1.500" valve).
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Brent.
If I read this correctly a bigger intake with intake porting and leaving the exhaust valve and port stock is your suggestion?