I have Baby Swamps, I ran them for years without an intercooler(but had to keep eye on EGT's). I still have mech. fuel and original HPOP. I can set the CEL if I work it hard towing. Best dyno #'s were 326hp and 660 tq. My stock 180K tranny lasted about 10,000 miles before the 2-3 clutches...