At the bottom of the archive list on AFR's website is the 'Ultimate Guide to 5.0 heads'
which would be worth a look at
http://www.airflowresearch.com/store/articles.php
also articles like '650HP 302...' etc which are good for a laugh
Comp Cams also have a series of engine build-up from magazines and have several 8.2in based builds at various strengths.
http://www.compcams.com/Community/Articles/
Note that when ordering your heads the same casting will have different part #s depending on the studs/spring pressures etc. (for flat tappet/hyd.roller or solid roller cams)
When comparing costs you also have to check that your intended lift will work with the installed springs - I think some people have found that AFR's may need a spring-kit if you're building a funky stroker.
Personally I went with the Edelbrock at the time because the price/performance was great value in my opinion - a number of guys down here have very nice 302's running Performer RPMs. Not pushing - just suggesting that this might be a way of evaluating what you're going to do.
It is probably worth looking at the various sites of the manufacturers because they update the product lines & specs every now and then and the articles quoting the specs etc may be several years old.
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I guess that they come with new rockers.
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They dont - you get to choose for yourself - adds to the fun.
Personally I went for the 1.6:1 so the cam could operate as designed.
I notice that Keith Craft is auctioning some nice SBF stuff that I would definately consider if I was in the market.
Finally, here is my pithy comment on re-curving the air-fuel...
LoBelly