Does anyone here run a 400 small block? I'd like to have 300 horsepower and 400 ft lbs of torque on 87 octane before I try putting 35's on my truck. I could cam my current 350, but I don't think a cam, intake, carb and headers is gonna get me there from a stock '84 350. The motor runs great, I know Edelbrocks performer pack with there fuel injection will make about 350 hp on 87, but that's like $3000 just in bolt on stuff. I don't wanna go there. I was wondering if maybe I should just build a 400 or maybe do a 383 stroker. I kinda hate to tear into my 350 since it runs so well, but hey, big deal, gotta make the ponys. I want something that will make the power, get decent fuel economy and run on 87 octane. Also, keeping it under 5,000 RPM would be good. Any suggestions?