Ive had a '87 w150 for the past 2 years about. Its got 200k on the slant. Should be more like 400k with it being a x forest service truck and the way its runs. I was gonna buy a motor and just swap it in along with my aluminum 2 brl , header and 38 weber.
Yea right....
Bought good running engine from a buddy outta a '75 dart? I dont remember it was dark and the car ran and drove nice.
I brought the engine to work on saturday to degrease it and pull the head so I can mill some off/ do a valve job and port it. That was ok till I kept finding lil things wrong with it.Valve tips were trashed - sounded like the valves were loose is all
needs some guide work on the exhaust
fuel pump eccentric is got a gouge in it
lifters and cam are worn
needed gaskets
Next thing ya know I had the whole thing in pieces
So much for a running engine.. Same thing happend to my cummins last summer 
The heads about halfway ported on it already, waiting on my SSvalves. I havent decided how much to mill off. Im thinking I'll take most of it off the block and just make the head flat. Try to build some quench into the slant. Only want ~9:1 tho.
Ordered a cam for it - its ~260 advertised - didn't go real wild or what not. I dont remember all the spec's off it.
Today Im gonna order the gaskets/ bearings/ rings. Might get pistons if they are cheap enough - might just do it anyways so I can be lazy and not clean the old stuff. - Would make it lots easier to balance the motor too...
This slant was supposed to turbo project, but a turbo slant will be a HUGE disappointment compared to my 90 cummins for power. The cummins makes 50+ psi of boost and 350+ whp and 700rwtq id estimate. Still need to dyno it. The slant Id be happy with 200hp @ the crank