03-29-2016, 03:37 PM
My '73 had a Cat 1160, the non-turbo predisessor of the 3208. 3208's come normally asperated and with turbos both, you'll need to ask. There are still a lot of boats running the 3208's so parts are redily available. It was anemic on hills, but got 12 MPG pulling an extended cab Ranger 4x4 pickup.
From what I hear, parts for the Cummins 903 and 555 (triple nickle) are getting expensive and harder to find.
You probably can't find anything under 38' with a 8V92, but the 3208 or 6V92 (with turbos) would be my personal choices. There are some older Newells out there already re-powered to Cummins 8.3's. Not sure, but @retro has/had a pre-80 Newell under 40' with a re-power for sale.
From what I hear, parts for the Cummins 903 and 555 (triple nickle) are getting expensive and harder to find.
You probably can't find anything under 38' with a 8V92, but the 3208 or 6V92 (with turbos) would be my personal choices. There are some older Newells out there already re-powered to Cummins 8.3's. Not sure, but @retro has/had a pre-80 Newell under 40' with a re-power for sale.
Jon & Chris Everton
1986 40' Dog House #86
450 hp ISM 5 spd ZF Ecomat 2
2004 Range Rover L322 Toad