Xe285hl cam

the Cam should have been picked before or at same time compression chosen.

You seem to be picking compression and band-aid it with a cam.

Smaller than 750 carbs don’t really match 285hl size cam. If you are worried about mileage with a 750 dbl pump, pick a smaller cam and less HP build.

4” stroker with 285hl cam is pushing 500HP.

4” stroker with 9.5:1 compression and 274hl is around 425-450 hp.