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

My best 60' came with a 9.5" converter, 1 .38 several times with my o!d 408. The 8" currently behind my 434 has been reconfigured three times and the best it's been is 1.40, and thats with probably 100 more hp and torque too.

434 what / sbc ??