Please Help!! I need to know what size injectors to use..
 

I have a 351W I am putting in a 88GT. It has Ported Edelbrock Performer RPM heads, mild comp cam, stud girdle, low compression, crane gold rocker arms, ported trick flow track R intake, aeromotive fuel system.

What kind of injectors should I use??

What is my estimated hp??

well, once you figure a horspower, it not too hard to get thet injector right. There is some room for error. Most engines run at about .5 pound of fuel per hp. so 400 hp would need 200 pounds per hour of fuel, or 25 pounds each injector. But you don't want to run the injector full open, just about a 80% duty cycle. So for this example it works out to 31.25 pound injectors.
400 X .5 = 200
200 / 8 = 25
200 / .8 = 250 ( duty cycle)
250 / 8 = 31.25 ( each inj)

Or you can play with the injector sizing calc. on this site. Its under "analyzer" on the far right on top. :)

I'd say 36's if you can find any, but if not, then 30's should still work well