High 7's in the 1/8..how much weight and power??

Cheap hyper SpeedPro flat tops .050 in the hole, 9.6 comp, .484 MP hyd cam, moderately worked iron heads, RPM intake, 750 Holley, 1.75 headers. Motor ran awesome for what it was. Eventually ran 11.0 in the 1/4 with a .528 solid cam and 5200 converter.
Ohh ok awesome! I’m building a 72 scamp. It’s going to have no back seat, no steel gas tank, no heater box, etc. Looking to go between mid 7.30s-7.50s. Have everything but the motor figured out. 4300-4500 converter, 904 trans with low first gear set,race clutches, etc. And an 8.75 with 4.30 or 4.56 gears. Just trying to get ideas for the motor. Thanks!