Cams/ HP

Anyone have an idea of how much hp installing a FRPP cam would make? Ill be keeping my stock heads/ valves springs etc until money allows for a decent port job. My car is not a daily driver and just wondering if a stage 2 would be worth the price with keeping stock heads. Once I get the money, Ill have the heads worked on. dont want anything too drastic, but want a little more chop and power.

Thanks for all the help!

LT Headers
Catted X Pipe
Spintech Super Pro Streets
JLT CAI with 3 Tunes
Steeda Kit (Springs, suspension)
Steeda Underpullys
Hurst Short Throw.
CS-67's all around.