is it possible to attain this?
I think you could get pretty close - you might have to go a little bigger on the cam though. Don't forget headers and little stuff to help you along the way like a pulley, ported throttle body, etc and of course the tune would be the most important thing.
That would be pushing it depending on your idea of a mild cam. The normal bolt ons with a 224ish 228ish cam and aftermarket heads would achieve your goal with stock like drivability.
No.
You'll need a few more things...
Your gonna need a pulley,FAST 90/90, valve springs,camshaft,pushrods,fullexhaust,tuning....an d your cam...probably won't be super mild. 430 rwhp is possible on a LS6 motor, with LS6 heads. The LS1...I don't think will do it with a small camshaft.
I've seen 400rwhp with the mods you've mentioned on an LS1...cam only m6, stock heads.
You'll need a few more things...
Your gonna need a pulley,FAST 90/90, valve springs,camshaft,pushrods,fullexhaust,tuning....an d your cam...probably won't be super mild. 430 rwhp is possible on a LS6 motor, with LS6 heads. The LS1...I don't think will do it with a small camshaft.
I've seen 400rwhp with the mods you've mentioned on an LS1...cam only m6, stock heads.
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Originally Posted by 06cobaltSS
not to hijack the thread but with an 03 Z06 is it possible with a callaway honker intake, Lg pro longtubes x pipe no cats and a g5x3 cam and a tune to put 430 to ground.
410-425 with stock heads depending on how big a cam you can live with. Buddies 99' Vette M6 with an LS6 intake, cam 232/236 .581 lift 114LSA, Kooks 1 3/4" headers and 3"xpipe no cats, Vararam intake, hand polished throttle body and still had stock cat back exhaust made 413rwhp on a 90 deg day. Heads and a bigger cam will get you 430-450rwhp... 
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From: Was New Orleans, but swam to Baton Rouge
I have a Z06 so I have the LS6 heads and intake already. I did a Futral F14 cam (232/234), LGM headers, Halltech air cleaner, B&B bullets, underdrive pulley, ported TB and had it all tuned. The car put down 423 rwhp and 408 rwtq. I recently replace my LS6 heads with Dart 205s and went up to 452 rwhp 423 rwtq. I think my next mod will be a Fast 90/90 setup and possibly an electric water pump to gain the last few ponies.
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Originally Posted by Sigforty
I have a Z06 so I have the LS6 heads and intake already. I did a Futral F14 cam (232/234), LGM headers, Halltech air cleaner, B&B bullets, underdrive pulley, ported TB and had it all tuned. The car put down 423 rwhp and 408 rwtq. I recently replace my LS6 heads with Dart 205s and went up to 452 rwhp 423 rwtq. I think my next mod will be a Fast 90/90 setup and possibly an electric water pump to gain the last few ponies.
i think the thing i love the most about these cars is the daily drivablity you can keep while still being fast as hell
Originally Posted by 06cobaltSS
not to hijack the thread but with an 03 Z06 is it possible with a callaway honker intake, Lg pro longtubes x pipe no cats and a g5x3 cam and a tune to put 430 to ground.
Yes.. Mods are in sig & it dynoed 430 (429.6) in a 110 degree dyno room. I have seen some with similar mods you mentioned, the stock TI exhaust and no pulley dyno just over 420. I have not seen to many results with the Honker, but then again, I haven't really searched. I'm happy with the Halltech I have.