The motor I have is a 68' 400 I was thinking about maybe using a ram air II cam.So you say the 068 is a ram air cam is it a ram air I ?What do you suggest on the type of cam I should use. Also before this motor I had one that was rebuilt but not hot tanked and when the motor ran the exhaust stunk bad.I was told that it was because the block was'nt hot tanked.Is that true and if so should I have this one done.See the motor is complete and I was'nt planning on tearing the motor all the way down.But if I have to I have to.