What can you really tell from pictures of ports? But, looking at the BPE head's pedigree and pictures, it seem hard to believe that the lack of power lay in the heads.

We just pulled our BPE 4.125 stroker kit 424/360 off our dyno here in Idaho a few days before the engine with the BPE heads was tested across the country. Ours was running our Indy LAX iron heads (290cfm @ .500", 301cfm @ .550", 303cfm @ 600", 297cfm @ .650"), Chevy 1.5 7/16" stud mounted rockers, Super Victor intake, 950cfm 4150, solid roller 258/260 @ .050, .425/.430 lobe lift, 10.83:1 compression, 165 psi cylinder pressure @ 5,000' elevation, 91 octane pump gas. Best pulls....480 LB-FT @ 3,000 rpm, 572 LB-FT @ 4,800 rpm and 603 HP @ 6,300 rpm.

How could a well set up stroker with the BPE heads not be capable of at least the same results?

Someone is surely wondering about the flow bench accuracy. As a comparison, the very best intake flows I've gotten from the OOTB Edelbrock RPM small block head was 248cfm @ .500" and 250cfm @ .600"

And the dyno? I always wondered. I took a mild big block stroker that was making 598 lb-ft & 585 hp on our dyno, to another dyno the very next day. 150 miles away and 200' elevation lower, with no changes to the engine, it made 615 lb-ft & 600 hp.

You cannot race flow benches or dynos.

I'm telling ya......If I was in the market for set of small block heads, I do believe I would still try the BPE heads.