Need some professional help-heads and cam

I'm dropping a 302 into an 88 4 banger. I got the motor fom an 86 mercury and i would like to get at least a litle power out of it. I'm on a very tight budget cause I'm getting ready to get married so i can't afford the good stuff. I got a buddy with a lunati cam that came with his systemax kit for his musang. I know i gotta change the computer to make it work, but would it be worth messing with. Also i need to know if I'll have cleaance problems with the factory flatops. I thought about E7s or a winsor head. Just let me know what you think. Just remember I'm on a very tight budget. Thanks in advance for all your help!!
 
The 86 5.0 is the most difficult one of all to get performance out of. The pistons put a very tight limit on what you can do and the heads are very restrictive. There's not a helluva lot you can do with one.