69 camaro engine build

[69camarokid]

OK. So i have a 69 camaro with the original 307 in it, the 307 has just been rebuilt and only has about15k miles on it. i cant afford a crate engine but this engine is severly underpowered for a lead foot like me. Ive already replaced the 2 bbl carb with a edlebrock 650cfm 4bbl carb, put on long tube headers, and 2 inch dual exhaflowmasters. This has me at about 240 - 250 horspower, im looking to hit 300 bare minimum, so wat do i need. please be as specific as possible ( so if u say get a cam, please say what type and where i can find it, if u know that is), but also i am a poor college student so superchargers and such are a bit out of the price range. Any and all advise is welcome, thanks.

[Orange SS]

you're wasting your time with that 307, save your money for a 350 then swap the headers, carb , intake over