We ran this unit last week. There was a little more in it, based on past info, but we ran out of time. Customer was looking for around 800 hp, and 700-ish torque, so when we got past there, we didn't beat it on it too hard. I had 31° timing in it, but it had a rather large dome by my standards, and a 72 cc chamber. I usually run much smaller chambers, with just a bump dome, but these heads migrated from another project, so more dome was needed. I think another 2.5 ° would have shown more power. I reckon they can test that in the vehicle.
Cubic inch: 535 (4.345 x 4.500)
Peak Horsepower: 893 at 6500 rpm
Peak Torque: 794 at 5100 rpm
Compression ratio: 13.5:1
Camshaft: .700 lift solid roller
Heads: BPE MR Race Pro Port Edelbrock
Manifold: BPE modified BBM Tunnel Wedge
Carbs: 940-ish cfm modified center squirters, inline with factory style linkage.