Hey guys i have a 91 w250 and i was wondering if that motor would be a LA or magnum? what were the years for both the LA and magnum motors? and i also found and 88 w250 and was wondering if a 440 would bolt up in place of the 360 easy or would i have to change some things? Oh and by the way i had a post on here a little while ago about my truck not running good. well i figured it out and my fuel pump screen was plugged. I took it to the fair this weekend and pulled 268.8 feet with it in 6500lb stock gas..not bad for a 360 SBM against the big block guys.