Cobra2 your car will be a tremendous lot of fun and very driveable. A 380hp later model Chevy is a sweet unit, and it will be quite good on gas at cruise too - for daily driving it will be everything you imagine, and 380hp is a lot for a regular street driven Cobra. It will definitely snake past all those wimply stock 302's and should comfortably beat a stock factory 427 Cobra with the 428 depending upon the setup and weight etc of your car.

I will never understand why people buy a Cobra 427 replica that is the very emblem of unadulterated power, snaking down the pavement, terrifying women and small children, and then put a wimpy 210hp (net) 302 in it. Some just like the looks and are not comfortable with genuine Cobra performance I guess... in which case I guess they're doing themselves and other road users a favour by not going further than they can handle... no offence to anyone else reading this, I'm not criticising, them, I'm just saying that for me (and you by the sounds of it), a Cobra is only a Cobra if it runs like one.

For me, performance doesn't get exciting until about 300hp in a Cobra weight vehicle (at wheels). If your car is a manual, you should have around about 305hp at the wheels, which will provide VERY aggressive acceleration at street speeds, with better power per weight than most of the factory 428 big block cars. Don't forget your wife's heart pills!