well...not counting your mechanical skills... you can get a used edelbrock performer for between $50.-$90. on ebay,(im selling another one in a week)...save a lot of weight, performance a tad better than stock...the cam, chain,lifters thing would make a huge difference for the price...i have almost the same car except for its a 342 gear rear end...and im on my 3rd motor...
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'74 formula 400, w/shaker (3 scoops) black deluxe interior, '70 406 balanced assembly, .30 trw slugs, moly rings, 4x heads 2.11/1.77 stainless valves, ra 4 cam, e-rpm intake, holley 750 vac. sec, msd hei, hooker headers w/ dual 3'' flowmaster 50 series ending at axle, t400 w/ GM6 convertor, transgo shift kit, b&m starshifter, 3.08 gears, centerlines, 265/50-15 bfg's rear and 235/60-15 front...yes im over cammed but it is still very fun...
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