19lb injectors can support up to 350hp. Beyond that the next step is 24lb, they'll support over 400hp. About the only thing you'll need 30's on is with serious boost or a good stroker.
If you stay N/A you will not need more than 24 lbers.
A healthy intake, cam, head combo will make around 350 flywheel hp on the 302. Which means if they are good, you can press the 19's up to that, but 24 lber's are the safer bet. Of course, if you add forced induction you'll need to make sure you err on the same side.
[This message has been edited by Unit 5302 (edited 02-21-2001).]
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