Streetmaster to Airgap

How much power can a 302 head make?

Well, on the same 318 short block, with the same cam, headers, intake, carb, etc...... with the CR between the heads equalized....... the 302’s make 40hp less that some equally prepared 596’s.

A 150hp 318 from a 78 Aspen wagon is NHRA factored to 230hp.
The weight break for O/SA is 15lbs/hp, so at 230hp the car min weight is 3450. Add 170 for the driver and min weight driving over the scales is 3620.