I figured I'd start a short thread to try and figure out what to do with the 506 engine that I removed from my Burb to make room for the P400. So the engine that came out of my 94 K2500 Burban only has about 50K miles on it and never pulled anything heavier than 3000 LBS. It was a warranty replacement somewhere around 1997 I believe. I believe the only issue it had was I stretched the head bolts (I believe). I have not had the block cleaned and checked nor the heads yet either. I ran Amsoil synthetic in it for about 43000 of the 50K on it. So if it checks out with no cracks in the block I was thinking of honing the cylinders, polishing the crank and installing new rings and bearings. I also have the valves from the P400 I could use along with the rocker assemblies. I also have 3 different turbos GM 4, HX 35 & Super HX 40. I have a new DS4 IP with 500 miles on it along with the DB2350- PE340 IP with 1500 miles (maybe) that I just took off the P400 (don't think I'll use that one on it). So is it worth it to do this? I don't have the accessories like manifolds and bolts and front cover and I don't have anything to put it in so it may just be a waste of my time because anyone would want a guarantee on buying a rebuilt engine I would guess. Any suggestions?