I have a used set of heads off of a 302 based small block ford engines These heads were professionally ported in the mid 90's by Dan Rawls. The exhaust pattern was modified to use the larger J302 header flange that was popular during that time.They include a set of stainless comp cams 1.6 roller rocker arms. These heads were taken off a engine back in the mid 90's that the factory block cracked on from to much nitrous... We changed combos and went with a set of TFS R heads and a aftermarket block 347 and the heads were put into storage... They have titanium retainers and 1.55 diameter roller cam valve springs... These heads are a steal at $1500 bucks for the pair.