Yeah, the Accel 580's are probably the best choice. Plenty of fuel for 500rwhp, high impedance, and easy to find. You need to get injector harness clips from RC Engineering, and if you don't want to modify the fuel rail, you need to turn the fuel rail end of the injector in a lathe. I did mine myself, but any machine shop should do it real cheaply too. I can send you pics of what needs to be machined if you want.