MCH ported my MP Eddy heads several years ago. My engine specs are very similar to yours. I broke my engine in on the local speed shop engine dyno. So here's my combo;

540" Hemi, 10.25cr +/-, 250* sft cam, .565 .547 lift, 2 1/4" headers, Indy single plane intake, and Thumper's 1050 Dominator. Made 697hp @ 6,800 and was pulling vacuum. The single plane made 11 more hp at the top, but lost 30+ lbs of torque through the range to the Indy dual plane back-to-back. So, I am running the dual plane in the car.

70 Cuda, primarily street car, 518od, 4,000 converter, 3.91 gears, 3,850lbs with me and gas. Have made a few passes at the local 1/8 mile track on a test and tune night. Not enough runs to dial it all in and with plenty of spinning, it ran 1.68 60', 7.16 @ 98.5. Clearly high 6s and 100+ is within easy reach with a little suspension tuning and a little practice.