I've got a stock 1988 Hardin Marine 350 Chevy engine. It is supposed to have 260hp. Specs are as follows: 4.00 bore, 3.48 stroke, 9:1 compression. A max of 4400 rpm. The other engine they offered was rated at 280hp, and had a max rpm of 5000. Every thing else is exactly the same, except timing, which is 12 BTDC@700RPM instead of 10BTDC@700RPM. Obviously, I don't know that much about engines, but i can change parts like a mutha. What is different about the 280hp, that gets it the extra 20hp? They have 600 Holleys. What kind of upgrades could I "bolt on", to give me some more HP? I'm not looking to change crank,rods,pistons, just the best bang for the buck without getting crazy. What type/model intake? More torq, rpm's would be great. PS: I don't what to swap to a big block yet. Thanks guys