I have one with 317 heads. I could sell running or without heads.

 

have a ls1 block crank rods, pistons, 1200.

 

I have a fresh out of the shop LS1 -disassembled, checked, everything checked into spec, reassembled with original main & cam bearings (excellent condition crank and mains and cam bearings had normal wear for a stock engine), new rod bearings, new ARP rod bolts, new LS2 timing chain, new ARP cam thrust plate bolts, new ARP cam bolts, new Melling 10296 oil pump, new GM LS7 lifters, new GM LS7 lifter trays, new Felpro head bolts (not installed yet), new GM head gaskets (not installed yet). Just waiting for the shop to let me know the 243's are cleaned, checked over, and ready to install with new valve seals and new LS3 valve springs. Has F-body LS1 oil pan installed. I had new rings on order but they didn't show up until after the shop had already reassembled the engine with original rings which they said they didn't see anything wrong with.
Cam is 99/00 LS1 cam (same as 01 Z06 cam) -aka the most aggressive the 3 different stock LS1 cam profiles.
I'm only looking to get what I have invested and if you only want the short block (minus heads, head gaskets and head bolts) $1500, or with the 243's installed $2000. Shipping will be your expense so if you are interested, lmk your zip code and if I will be able to ship to a business address with a loading dock or forklift (to unload from a semi) and I will get you the price.
I'm located in St Cloud, MN and can get pics tomorrow if you are interested.