I think that at either had #11 or #16 small valve heads(if indeed they are 1970 peices). That gives him a CR of either an 8.6 with the #11's and 10cr with the #16s. From what ive learned here a CR of 8.6 is great for the street and a CR of 10 is too much. either way not the greatest heads but decent for a street car. Im putting that same cam in my 350 with the 350#11 heads and i can't wait. ( it could have #12or13 heads maybe too. but those were for 4bbls i think..)
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