Quote:
Originally Posted by 65ZR1
I wouldnt use any product to narrow the ports back down. Except for welding, there is now way I would trust the filler to stay there with the gas, air, heat and vibration. Just think of what that stuff would do if it ended up in the cylinder.
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Amen!
Fer sher, I wouldn't use JB or anything else but welding. But, you will end up with a net gain regardless. If you have a die grinder, you can radius the edges of the primary ports on the heads - take less than an hour, and it might be worth a few extra ponies to boot?
P.