Easy Greg. You should know about the Miata's before you freak out. The 94-97 motors are IDENTICAL. When you order a crate from Mazda, you get the same thing for any of those years - from oil pan to head... the ONLY difference in the cars is the change from OBD-1 to OBD-2. It's 100% software.

Since this modification is legal in IT, there is effectively ZERO difference in the cars in IT-prep.

On edit: Talking with Bowie Grey and Mike VanSteenburg on the 1.6 vs. the 1.8 - neither can decide which one they would think will be better. Bowie chose to rebuild his 1.6 instead of building a 1.8 and Mike told me just yesterday that he thinks his 1.6 will PROBABLY turn out to be the better racecar.

AB