Help me get into the 12's for cheap

I went 12.30-12.50's in a 3400lb car with:

360 LA roller engine, stock bottom end, thin head gaskets to raise compression (ran on 87 octane), new bearings and rings, ball honed
Custom ground Hydraulic roller (IMM engines) with if I recall had about 230/230 at .050 duration, 106 LSA installed on a 101 ICL and .540 ish lift??, IMM Rhs heads, hughes 1.6 rockers
Airgap intake, 750HP carb, 1-5/8 headers, 3" exhaust with x pipe and borla mufflers.
Caltracs, 28" ET streets, and a 4.10 gear


was a fun engine that I beat the ever living **** out of, and it ran on junk gas. I would imagine with an auto and the right converter slightly faster times could have been had. Sometimes I still wish I had kept the engine just like that and sprayed the piss out of it to run 10's, blow it up, junkyard shortblock and do it all over again