OK, i have a 347 stroker with a FULLY ported cobra intake upper and lower, gt40p heads with a 3 way valve job, E303 cam, and dont know what size injectors to go with im leaning towards the 36lb ones but i dont know if they will be too much for my setup what do you think?

 

How many horses are you making at the flywheel?

 

425 at the crank

 

If you are gonna supercharge it, you must go with 42lb injectors. If not 36 is fine, I have the same engine setup except the block and the 36 are fine for me. I have to change them to 42lb when I install the SC. I had to have my mass air meter recalibrated though for the 36lb. I can't wait to supercharge that sucker.

 

36lb/hr would probably be a good choice for what you currently have.
I believe the 03 cobra comes with 39lb/hr and they are making around the same power at the crank.