what whould u say a car 4.125in bore and a 3.710in stroke with a set of ls6 big uglyes flow 322cfm at 600 and a magic stick v3 cam make for rwhp ballpark

 

low and mid lifts, port volume, valve sizing, compression, tranny, rest of mods.

but out of the info you have givin i'd say 1 million hp....

 

Not as much horsepower as it would make if you put a bigger cam in. I think it'd need more cam.

 

M6 or A4?
Compression?
You should have some real good compression if your running flat top's, but we have no idea what cc's the heads are, the piston being used, the head gasket being used and therefore have no way to figure compression.
10 bolt or 12 bolt?
What kind of headers.
I think JRP over rated your setup a little maybe 850,000 HP.
Maybe he way talking about flywheel HP and that is where he came up with the 1 million number.

 

I am fairly familiar with big uglies and if the compression is 10.5-11 I would say 47x/43x at the ground through a manual. What kinda block are you runnin?