[gradall20247]

I recently rebuilt by 302. Ive got a GT40 intake, 65mm TB, 70mm air meter, ported E7's (stock valves) and a B cam with 1.7 RR. I believe this should give me about 320 HP. Are the 19# injectors still OK or would it be better to go with 24#'s?

[EagleAutosports]

How do you figure on 320? I don't see any info on the bottom end so it sounds like a stock type bottom end with no balancing or blueprinting.

The 1987 5.0 engine starts with 225 hp. Then you add...

GT40 intake = 15-20 hp
65mm throttle body = 10 hp
70mm MAS = 10 hp
B cam and 1.7 rockers = 15 hp
Stock E7 heads, ported but still with stock valve sizes = 15-20 hp

I'm getting around 295 engine hp, then you add in the correct tune and you could be around 300-305 engine hp. Of course this is my estimate, get other opinions. But the limiting factor are those stock heads. Even when ported, they're still limited in the power they can add, they won't add as much as aftermarket heads. But we all do what we can, especially if on a budget. Should you upgrade anything, these numbers that are added by each part will increase.
At this point, you don't need 24's. The 19's are good up to around 325-330.