My 93 Cobra has a few minor mods the fella I bought it from had done but I'm thinking about stepping it up a notch. I was planning on upgrading the heads(comp AFR 165), cam, honing the upper and lower intakes and a bigger throttle body & MAF sensor. I'm assuming with the heads I'll have to upgrade the springs, push rods, lifters and rockers. Or I can just bolt on the Blowzilla and save about 8 hours of work for the same amount of money. I'm looking for some decision help guys.