Opinions please

Screw the mileage lol

Ok, then put the Holley on it and lose some bottom end snappy. All four of the throttle bores on the Holley are the same size. That will probably be a little rich for the 273 and it will fall off some right off idle compared to the other two. It's not my car so I don't give a crap. You did ask for opinions and that's mine. Good luck!