Now that I am buying a 2.55", I am gonna be putting a new cat on, and getting colder plugs. What plugs are recommended and what gap? And also, anyone within Ohio, IN, PA, or MI with a scantool? If so, Maybe I can drop by at your house and we can take a look at the KR before installing the pulley?

EDIT - The EM'* are only 2 years old and are crackless.

One heat range colder. I suggest NGK TR-55 V-Power plugs at .055".

Carefully inspect your exhaust manifolds for cracks and check your fuel pressure before installing the pulley. A high-flow Cat may also be necessary.

You MUST check your fuel pressure and scan.

Cool. I have a fuel pressure gauge in my basement that I can go dig out. Hopefully I can find someone in my area with a Scantool or borrow one off of someone.

So when I pulley mine I need a 2.5 or a 2.55? Or are they the same thing from pulleyboys?

Since my fuel pressure is actually higher than normal would I have a problem when I drop sizes?

A 2.55 is the stock pulley used on the 92-93. This is what I am getting

I'd run a copper plug 2 heat ranges colder and you really could get away with almost stock gap. If you don't want to chance pulling them out again gap them at .055"