Yeah, they are old, and, yeah, they are heavy, but man, you can buy these cheap! 1981 Cummins, V504N's, 205HP, Twindisc gears, extra starters and heat exchanger. PO said they run fine but I can not confirm. $2000 or swap for stuff I can use on my 28' SF project boat. Call Howard at (616) 335-6837 or e-mail here or hobo@wmol.com. Thanks