Also take a look at Dean Polopolus's 911-4 (four cylinder 911 engines) if any of the cars that show up have them installed. The 2.4 liter version with Weber 48 IDA carburetors could probably make 220 BHP easily - Probably my next car project is one of these as a primary or back-up engine. Special case, crank, and cams with modified cam towers and valve covers (shortened), modified oil pump, modified cooling tin, and special distributor - everything else is stock 911 engine parts (but aftermarket titanium rods and aluminum flywheels are available). And you would need a custom exhaust. Dean says a complete carbureted 2.4 liter 911-4 weighs about 270 lbs.