Hi ! I am looking for some pictures and help on unshrouding and re-shaping the combustion chambers on my # 670 heads. The heads go on my 66 421 short block .060 with 428 .030 pistons with 4 reliefs. What can be done to the air passage holes next to the exhaust valve guide in the port ? What is the best material to fill the exhaust crossover in the heads and is it necessary to do it for street use. I had a thin piece of stainless steel blocking it off before at the head and intake gasket.
Thanks for any help.
Larry
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