stock 853 heads or 862's
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stock 853 heads or 862's
i just came across some 5.3 heads that are stock, and I was wanting to know if anyone has done a flow test to see if the 5.3 heads flow the same as the stock castings. I want the higher compression, but if I don't get them ported and polished, will it hurt instead of help the situation?
Thanks
Evan
Thanks
Evan