Exhaust Cutout Question
 

This project been one thing after another...

Did some initial test fitting of new swim platform on transom. Unfortunately it blocks where the old TRS exhaust & water dumps were. This platform came off an early 2000's Cig, so guess it was for Bravo's. It now looks like i will need to sell my current Gil's for Bravo style. I assume there is some sort of standard measurements to know where to drill the exhaust cutouts for Bravo's. I have done some searches but all i can find is for the actual transom assembly. I checked a couple exhaust reseller's & couldn't find anything there, but they mention "standard Bravo hole location". Does anyone know what this location is, & how to determine? Is there a way for me to measure vertically off the drive centerline to come up with the center point of the exhaust exit? I assume then the horizontal distance is still the same.

Think i found what i was looking for
Attachment 577121

Also could i keep my current GIl manifolds & just get different risers & tails? Not sure of my options on such old setup or just need to get new Imco's or the likes.