If it were mine, I would punch it 30 over and drop a 400 crank it to bring you up to 383. Cubic inches = torque better for the hole shot. plus you gotta get a crank rods and pistons anyway why not? A set of the old double hump heads with a good port and polish job and over sized valves, let her breath. since your going to be running 110 go 10:1 compression and slap a blower on it, then a good cam. oh and balance and blue print. should put you at your goal with out having to juice it. More costly maybe but in the long run it will probably save you some money on burnt valves, rings, pistons if something goes wrong and combustion temps get too high. Granted im an import guy 4g63's and sr20's all day, push rods make me laugh. But there is something to be said about american iron.