I agree with Bill. The most cost effective way to make big HP numbers with a slant is a turbo. To get the same numbers normally aspired, would make the engine unstreetable. I did a real simple turbo slant back in the late '70's by putting a Corvair turbo on a 170 65 Valiant. I could drive it to the track, open the exhaust, put on the slicks, and go 13.4's at 104 mph. About 10 lbs boost.The hardest part was the "tuning". Back then there was very little turbo info available to the "hot rodder", no boost timing master, no air fuel ratio gauges. All I had was a EGT from a airplane. My water/alcohol injection, was a windshield washer setup, with the nozzles spraying down the carb. Triggered by a 5 lb pressure switch.
