Found this on Konrads site

https://static1.squarespace.com/stat...+JULY+2016.pdf

it does show where the drive shaft center is in relation to the transom assy on page 15

Thanks for the help. If i would have known i was going to buy drives, i would have measured my TRS prop depth for a reference point before taking them off. But i still dont think these drives are going to cause me too much install grief (granted i said the same about replacing transom & stringers..)
I have been in contact with Kurt so once i send him some pics of the drives to verify the lowers, i think can then get recommendation of what depth to set the prop center & can be off & running again. Then i'll have questions regarding my Gil's & reversion if i take 9" or so off.

There is a lot of information already on this thread, and I don't want to muddy further, but crankshaft centerline is parallel to the hinge pin center location on gimbal-ring/transom-bellhousing. If you have or can locate a TRS gimbal simply measure the hinge pin location relative to mounts studs and then transfer to your TRS cutout stud location if still on hull. Hope this helps a little... Jason @InshoreOff

Are the exhaust holes already cut out??? If not, you could run the risers as is all the way through the transom.
Not sure what if anything you did to the engines as far as cams, but if stock cams, you won't have reversion issues with shorter risers.

Thanks JB. I didnt even think about gimbal/bellhousing. lol. those i do have.

So now i need to figure out what my xdimension should be with these drives. If my measurements are correct, i think this new drive is 18" from drive shaft to prop shaft. So i think these may be their x-factor shorty because a regular one is 22.5"

Griff- no the exhausts are not cutout. I was thinking i probably could too, just wanted to take it into account before i start going crazy with cutting holes. I was hoping i could cut off the 8 or so inches that we move the engines back, dam up the walls, & weld in a new water outlet bung & be good to go.

I also discovered my current Bravo props dont fit on the spline as is. The propshaft is larger on these drives.