To all, I have a 70 SS LS5 454 Chevelle w/ a M22 4-speed 3.73 rear all stock with the exception for headers and a edelbrock 750cfm carb. The problem is I have this pain in the but guy with a 455 GS convertable that keeps breaking my balls and I want to blow his doors off BAD!! Are there any quick preformance tips you guys can give me without really going nuts that will give me an edge his car has some work done to it but not much, the timing is set to stock (6 BTDC) can I advance it to gain some speed? Any input you guys have will be greatly appreciate it!