340 build help

Hey guys,

Back with yet another mission. I just got a really nice complete 340 out of a wrecked 70 Challenger with 65K original miles on it. It is complete from carburetor to oil pan and in running condition, but I want to go through it before I drop it in my dart. It has a mild cam, but I don't know the specs on it. From what I am told the engine is 95% stock original with exception to the cam and an 650 edelbrock carburetor. My current setup is a 318/727/8.75. I have a 1971 2-door dart swinger and my budget is a little over $3K. What can I do with this budget to make some power? Any suggestions are welcome. I have no idea what direction to go in yet. Thanks!