This months carcraft mag.Has the new AFR heads in it

That's a 557 with a 325cc port volume. It will be interesting to see what the AFR 300cc flows with .625 raised exhaust port.

We had an engine done back a few years ago for my buddy's truck, it was 501ci 11.1 comp. with iron cobra jet heads that were mildly ported (bought them from chuck"Lone Wolf") and had Lem grind us a solid roller with around 258 @.50 268 @.50 .700 lift it made 722 hp on the dyno with a 1150 prosystem carb. -A

Are the exhaust side numbers with a test pipe?

yes

I had the one Prototype tfs street exhaust port flowing 283 with out a pipe.