There are several engines in that yellowbullet link I posted (some of you guys?) running the Indy SR heads making north of 800hp on mild builds. I just thought the Edelbrock Heads should out perform them with the larger intake valve.

My build is a Musclemotors 604, CNC ported Indy SR, custom solid roller, and as of today Barton rocker arms. Hoping to be >800hp and able to survive Drag Weekend and Drag Week.

What do they flow? Mine flowed 387 after Indy's CNC and Jeff@Modern did a bowl blend. With 10.4-1 compression, a Bullet solid roller .767/.676, 288/292@.050, tunnel ram and 2 850 thermoquads and about 50 dyno pulls tuning it, it made 853hp&818ftlbs. On my dyno. I have not finished updating the motor yet. A new set of the Indy Hi-Po heads, (they flow 442 corrected) and a couple other goodies. I'm guessing 925-950 If everything works correctly. Dave

I'm not sure what they flow. MM hasn't given me much info.

The Eddie heads flow a touch over 400 out of the box and 450 cleaned up