Okay, I've been searching forever now.

Are the 3VZE "performance" parts interchangeable between the years?

Will 93/94 headers bolt onto a 95?

 

Yes, the engines are virtually identical.

 

I know that the idler pulley/timing belt changed somewhere along the line (early 90's)on the 3vz

 

Correct, it was when they switched to the serptine belts. Older motors had the v-belts.

 

Ive got a later 3vz head (where the timing pulley mounts) going into my rebuild. It was all that was available in my area. Are there any other differences that im going to have to account for other than a different timing belt and idler pulley? Will all the stuff from my 89 fit?