For those wondering about cams, the HP Billet cams are now "officially" worth at LEAST 47rwhp/31rwtq. They're actually worth more (probably 60/40), but I don't have the fuel system or the shortblock to find out, lol.
If/when you go with an i/c look into Snow Performance. You can find his ad in MM&FF. He sells water/methanol injection kits for $299-399. The best thing is you can just refill it with windshield washer fluid. The 93 Cobra in the ad is his. He is pushing 650RWHP at over a mile high with his 306, procharger P1SC (no intercooler to prove the effectiveness of the kit), and a shot of nitrous. The kit is amazing and alot cheaper than other kits out there. Check him out.