I'm running a Imco SC Extreme with a 12" stand off with a 3" rise with 1.34 gears, I know I will have to go easy out of the hole, but hoping it holds up otherwise, it's used for cruising mostly, but every now and then someone needs there attitude adjusted. there is a nordic thor down here that needs a tune up. But you never said how fast it runs, what is your drive set-up, how deep or shallow is your drive set up.
Thanks
Larry

Daddy
 

My drive unit is built by American Propulsion and is called a Sternpower very heavy duty unit right now I am running a 1.30 gear ration about an inch above the bottom I have run 2 inches above. I have been expermenting with height and gear rations . I am going to drop the boat in the water around May 10 This unit is almost out of the proto type stage and will be for sale soon. I have been helping the factory and they have really been helping me !! My boat runs in the 110 range but I'm sure with the drive changes we have made that number will be low looking for somthing in the 115 to120 range, one can only hope. I am running a Bam trans also. You have a good lower but with the massive power you are planning I don't think it is going to last. My brother is a dealer for Imco so we talk to them a little and they think I had to much power for that imco lower and I think yours will have more . No problem with hull strengh but you mus t run that missle with a good head on your shoulders any hull will break if it misused enough.
p.s. extention box was a good idea

if anyone is interested, randy schultz has a couple of sternpower drives in his shop .good luck

Thanks for your input, you can never get enough info on this stuff, It should be seeing water in about 10 days, so we will have to see how it runs, good luck with yours and I'm going to lock into the sternpower drives, I've never heard of them.
Thanks again
Larry