Thanks 30ss. How does your boat run with the drives 4" below the bottom? Does the boat have any issues with prop blow out etc?

When I first got the boat it was a bear to get on plane.
I had Mirage plus 21p, took them to Hale prop and they took them to 20.2 and added some cup.
Made it much easier to get on plane and cruise efficiency is great.
50@4000 around 18-20 GPH, 63-64 @ 5400 60 GPH
I only have about 315hp a side so it's no rocket.
If I played around with props I might get more out of it, but when summer is here I'd rather be boating than tuning.

Thanks so much 30. I think I will start looking for some -3 lowers.

I just bought a 97 31ss with imco -1 drives, I will measure X dimension and let you know.

I have a 97 31ss with 2" imco shorties. runs 80 to 81 gps. yes prop blow out on take off. put on 1" spacer and it still blew out props but dropped the top end to mid 70's.