Doing this engine swap (as long as you stick to the SAME engine) is a, first year mechanic, sort of job. Plenty of room, no negative angle,blind, fasteners I can think of. No need for Isuzu specific knowledge, if you can swap out a Chevy, you can swap out this one...he's not rebuilding the thing, after all, just dropping it in. Any "competent" shop won't hesitate...someone hesitates at all, take your biz elsewhere. The actual labor should run about 700+/- 2or three. A remanufactured block should go about 1800 or so. Wayne