I put the injectors in and i had to advance the timing to 18 deg. (which i dont like with out studs) just to get the truck to rev with out popping. Is this normal? I had tappered dv but pulled them out untill i build my twins. Do you think I can put the dv back in and that will alow me to lower the timing? I had 370's in it and i am thinking about putting them back in if i can't run the timing any lower.