R & D on Performance heads & Intake

The head porting is the easy stuff but... The exhaust logs are really nasty especially on the drivers side of the motor. If you look at both manifolds you will see they feed up or down and the passenger side is the best of the two. There isn't much you can do with them and the psd manifolds wont fit the idi motor. I tried that already. The intake side of the heads are tuff trying to do a complete port job on them. Its just too tight of a turn but you will find this out . I have done several port jobs on these heads and prefer using the new offshore castings. They are build heavier where they need to be.. Plus they are clean.... On the exhaust side clean out the valve stem bump in the floor will increase your flow plenty. These heads can move some air but remember they are just big air pumps. Getting 10 lbs of boost on the intake valve before it breaks open is important and having clean flowing ports in and out will do lots of good for the flow. A mirror finish isn'y really needed but it sure looks nice. Thats what I finish mine at.