ok i just put my 3.1 liter back together 4 my o2 gp everything is brand new. new crank,cam,timing set,oversized pistons,block bored 30 over,lifters, the works an then i finally crank it up an id say its probaly idling at like 3000 rpm my tac wasnt workin also for some reason an it also started to over heat but i think it might be in the intake you cant hear it but from wat i have been told its probly a vacuum leak. this engine has really been driving me crazy any help,tips, or suggestions would be appreciated