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Here's what I'm talking about.... CAVEAT; I do not care about "street legal" restrictions or laws whatsoever! I want to first improvise to squeeze more power out of my old 1983 EA81 Brat just to take a mountain grade I have to drive without getting bogged down to 40mph in third gear until I can figure out an afford to replace the engine with something with significantly more horsepower. I need whatever help, suggestions, ideas, sources (for S. Calif area),etc. Stage #1: (A) Start looking for a 5 speed tranny ( Improvise horsepower by possibly linking both barrels of my standard carb together, saw something about this here somewhere, need to know exactly how to do that; maybe use better grade of gas, and/or add improvised octane booster like paint thinner or lacquer thinner or something; I do plan on replacing exhaust with something completely different using 2 inch exhaust pipe, which for a Subaru is like headers (Yes, I know about the back-pressure issue, already factored into design. Question: I have a tiny parts store air cleaner on it, only maybe 5 inches across, will bigger air cleaner/filter make a REAL difference? Also thinking about improvising some kind of ram scoop to crudely force a little more air into the carb; Maybe get webber carb unless that would be replaced or eliminated by whatever the next engine is. Imprvisations/suggestions? Stage # 2: New/used engine: Preference #1: EA81 dual carb engine if I can find one, install webbers, super-charger(s) - why? (A) I prefer super charging over turbo ( I prefer not having a timing chain or electronic ignition - I just do. © (Forgot, lol) Preference #2: EJ2200 or similar as per people's suggestions, whatever has the maximum possible horsepower within affordable limits and will bolt into my Brat, - hopefully. I don't want to go broke going too extreme, would prefer the simplest, most affordable way to seriously boost horsepower and speed up a mountain grade regularly. Thank you in advance for all suggestions/ideas...