No problem, hope I can help.
Tubbing it is cool and all, but you're estimating approx. 600hp, right? A high number sure, but tubbing gets expensive between the special rear, assembly, fabbing, wheels, and (gulp) tires. You can get really good tires for street/strip with much less modification, things like rolling the fenderwells getting appropriate wheels and such, that would be sufficent for you're combo. Unless of course you just want a tubbed Mach
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If you plan on this as a regularly driven street car (hopefully not your daily driver, lol) tubbing is even less attractive. The tires you'd use cost a fortune and roads eat them up. Maintanence costs will be extreme.
Also I'd be more concerned with driveability and longevity than peak HP numbers for a regularly driven car. You never know, but setting it up for a few less HP and lb/ft could make it much more mannered and longer lasting. After all, if this builders challenge was concerned with peak HP then it didn't have to last any longer than the dyno pull. Assuming you are not Bill Gates I'd really put a lot of wieght on this fact.
Is the car an auto? If so it can be even harder. You have to keep the tranny cool, and traffic with a monster motor up front will make that hard. You'd need a cooler and a deeper pan for starters, likely more. Also if it is for street/strip duty then you'd want a higher stall converter, which would be far from ideal on the street. Gearing will be a factor as well. Say you throw 4.56:1 gears in the rear (9" I assume?), which would be a likely choice, then you have the higher continuous RPM from them and the higher stall converter working to make lots of heat and abuse.
I guess all in all the most important advice I could give would be to focus on the street side first. A street car can perform well on the strip, but a strip car has a much harder time on the street. Focus on longevity and durability (I'd use all forged internals, no stock parts, preferably a billet steel crank and forged H-beam rods, windage tray, main stud girdle, blueprinted oil pump, the usual list). Hope that helps, and any questions I'll try to answer, ok? Good luck and upload some pics when you build this thing, sounds badass!
Endless