hey, I've got the old block from my '87 K5 in my garage just taking up space. I cracked the pass. side head (stupid D.I.Y. project w/ distributor). All accessories, etc, have been stripped from it for my other engine. Anyway, it was rebuilt approx. 8k miles before I broke it. It was 'mildly built' by a local Carquest where I used to live. I do not have specs but can contact them to get what I can. I have not had it checked out (for other damage). I can and will take pictures upon interest from prospective buyers. Make me an offer; buyer responsible for pickup.