I have a 1972 Dyne I've been restoring with a 302 I/O and Volvo 280T outdrive. I put a new 302 in last summer and it runs great! However, the tilt/trim system is my next project. I don't even know where to begin. The main "piston/cylinder" that pushes the out drive up was shot, so I had it machined back to working order. It's the rest of the system that has me lost. I can get it to move but not very far. I know it can go higher than it does. It seems like they really overcomplicated the design. I need detailed schematics to see what parts I might be missing. Or maybe a stick of dynamite!
I can't help with the Volvo. If you decide to go the stick of dynamite route, I have a suggestion. I converted my I/O to an outboard about 10 years ago and everything got better. It performs way better with a 150 outboard than with the 198 hp 305 chevy I/O. I think it looks good too. here are pictures: jim
Check out this site: http://www.boatengine.net/ and: http://www.boatengine.net/t/049497.html and: http://www.marinemechanic.com/volvo/tilt_lock.htm and: http://www.marinemechanic.com/Workhorse/index.htm jim