I have a 1996 scarab. My prop shaft depth is 8" at the moment with the stock bravo one. I want to install a -3 imco lower. But have heard that I'll have to modify the upper. I also have thoughts about an ext box. But from what I've read I don't think I'm gonna go that route. Any advice will be appreciated, thank you. Travis

the guys on this site who are really in the know about set up, first need the length, model, single or twins and hp and what props before they could suggest a route to follow

It's a 26' scarab with stock bravo one, 26p labbed prop, 672 hp n/a 540.

this could get good

Why you say that. Lol.

What complaints do you have, and what would you like to better

They are a 26 degree deep V right?

It is a deep V don't know the degree tho. It's a 26 foot scarab. I don't have any real complaints so to speak. But at 5300 I'll 75 all day. My peak hp/tq is 5800. But can't reach it with the 26 I have. I'm trying to figure if I bring my prop shaft depth up to 5 from 8 would I run better and more efficient cruising.

I do have a stock bravo 24p prop but I run out of rpms. So I know 26 is what I want just want more R' s. So I think with the -3 shortie lower I can get what I want, but I've been told that I need to modify my upper to make it work.

It may work but there is also the very real possibility your prop wont be right at the new height either.