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Blown 383 combo, what do you think?

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Hey guys. I know there are a lot of you here with large amounts of experience dealing with blown motors, and this will be my first, so I was hoping to get some opinions on my new possible combo. Not built yet, just doing all my homework before I get into it. I could use some help determining which cam and heads to use.

Car: 1972 Nova, 100% street car, will have a roll cage in it by the time the engine is done
Transmission: Built TH-350, 3800ish Stall. I'm aware I may need to upgrade to a TH-400, but this 350 is fresh and I'd just as soon kill it first.
Rear End: 8.5" 10-bolt, Yukon posi, 30 spline Moser axles (w/c-clip eliminators), Motive 3.73s

Engine combo I'm speccing out is as follows..

Block: 1970 "010" block, 4-bolt main, .030 over right now
Compression: 7.5:1
Crank: Either Callies Compstar 3.750" or Scat 435056 3.750". Both are 4340 forged. What's your opinion on those?
Rods: Scat "pro-stock" 4340 forged 6" (currently in the motor)
Pistons: Keith Black forged aluminum, dished.. I'll figure out how much dish I need when I finalize everything.

Induction: Weiand 6-71 roots, fed by two Holley 650 carbs. Hoping to push 10 PSI with water/meth injection.

Heads: Strongly considering either AFR 220s or Chad Speier ported Pro-filer 210s. Not sure either way, same price for both. What's your opinion on these?

Cam: This is where I could use some help. I've gotten a few custom recommendations and so far I like this one using Comp Cams "TK" lobes with a good split:

246/251 @ .050 (Advertised 274/279), .680/.688 (1.6 rockers), 114 LSA.

Solid roller, of course. That cam gives me 20 degrees of overlap if I've done my math right.

What would the gurus of boost suggest for a cam? Is that one decent?

Anyone with a similar setup? How do you like it?

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