I may get that Volvo's comp since I read somewhere the early Volvos came with the better/bigger Yorks. I've read a lot about OBA set-ups but haven't jumped into that project yet; I want to get a bigger alernator before I do much of anything else. Here's what I've found that looks pretty good to me:
http://www.kilbyenterprises.com/oba-scem.htmI'm also getting a fuse block from 12voltguy.com to run the extra electrical stuff to avoid burning down the truck.