Well I like the idea. Big cubes and small everything else. It would make a killer street motor but will nose dive around 5000rpm. I say built it and ditch the tunneral ram and go with the performer RPM manifold.
I do agree what was said before that it's not the best combo(your leaving a ton of HP on the table) but it will run none the less and have killer torque. If you go by way of 440 source please have your machinist check all the stuff.
Last thing I'm a firm believer in spending as much as you can in the block and rotating assembly. You can always upgrade the heads, intake, cam and carbs later.