most ppl dont like the 305 but i like them, they're damn good motors and extremely reliable, plus you have TPI (tuned port injection) that's alot right there, i'd say go with an edelbrock performer package, www.edelbrock.com you can order all the shit from www.summitracing.com for i'd say about 800 bucks, you'll be makin real nice hp and tourque. and you'll have no problem lighten them tires on fire go with the 305 they're a very uncommon engine and great in my opinion.

p.s. for a bore...go with .30 over