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I've got a LT1 355 with ported aluminum head and a custom Comp Cam 214/224 .530/.530 Lsa 114.... 52mm TB

Would the stock fuel injectors work fine or will I need bigger injectors like SVO 30lb injectors?????
 

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The stockers may work just fine, depending on how much head work you've done. The only way to be sure, is to put it on a dyno, with a good tuner, and see.:)
 

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You'll get personal preferences both ways on this.
I would stay with the stock 24's, make sure your fuel pressure holds up on WOT pulls.
24's will easily support 350 rwhp; there are 30's supporting 500 rwhp.
Is it tuned? What was the AFR? what was duty cycle? rwhp?
If the car will be under extended WOT, like roadracing, and if you're well over the 350 rwhp level, then I'd consider 30's.
 

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Ive got a forged 355 with 30's on it and it seems to do great...It loves to drink gas
 

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My similar setup to yours was at 82% DC so i got the 30# SVO's
 

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Your duty cycle will most likely be high, I'd get 30s so you can tune it all at once.
 
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