best 273 mods?

my original 273 was already bored .060 and the walls were less than desirable so i got a 318 block from the yard for $50 and went from there. i used the forged crank and rods, along with the heads from the 273 and a balance job. the janitor at my shop thought my box of spare parts looked like junk so my adjustable rockers are gone. i think i used a 340 cam but i cant remeber the specs. i know the block was bored .040 and decked .010 because of a large scratch on the deck surface. if my math is correct, it should be around 9.5 - 1. with a 600 edelbrock and original 4 barl manifold it sounds tough, but the stock exhaust manifolds are less than high perf. i dont have any real power #'s to speak of yet, just thought i would throw it out there.