Hello, I like your combination! Should make real good torque for the steet!!! I also like your header combo, very good choice!!! I have Built very simular combo's in sb. chey's. I use a 750 holley, vacuum secondery setup. Good street drivability!!!! You will still need to do some tuningwith,accelerator pump size, some jeting,and secondery spring tuning!!!! But al in al you should be good with that!!!! Good luck, HAPPY NEW YEAR!!!