I bought a SB 350 unassembled long block kit back in 1998 from PAW. Fully machined block (0.040 overbored), pistons hung on the rods, balanced (not with my flexplate or harmonic balancer, so that couldn't have been a TRUE balancing job for the rotating assembly), and screw-in pipe plugs where necessary. I went with a cast crank, TRW forged pistons (flat-top 4-valve relief), Clevite bearings, house brand cam (since changed to Comp 268XE), and Edelbrock Performer RPM 70cc chamber heads. Push rods and rocker arms were Pioneer brand I think and piston rings were moly. Cost was $2600 out the door with tax (I picked the parts up personally to save shipping - I lived in So Cal at the time).
All clearances were within spec and the assembly went great. In the five years and 21,000 miles since, it's run beautifully. I've upgraded the cam, valvetrain, rocker arms, and installed a steel shim head gasket since, but the bottom-end remains the same. I needed a 350 block and this was a convienent way to get one. I'd buy from them again. One thing though: they usually charge extra for any block overbored less than 0.060 (like $100). The guy taking my order dialed me in with the 0.040 block for no extra charge.
Probably more info than you wanted Rich, but there it is anyway [img]smile.gif[/img] . Any thing else you want to know about it, just ask!