how much horsepower does my 390 make?
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how much horsepower does my 390 make?
my guess is somewhere between 300-400 but does anyone have a better guess? its a car 390 from a 63 thunderbird with 9.5 to 1 cr. performer rpm intake. edelbrock 600 carb. k&n air filter. cloyes strait up timing gear set. comp cams 268h camshaft. hedman headers with 2.5 inch exhaust and glasspacks and msd ignition system. anyone with a similar engine build know there hp? its got plenty of power but i was just curious if someone had an actual hp number. i hate when people ask me about the hp and all i can say is i dunno
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