I have a very good and verified 312 short block for sale. It is currently apart and contains, block, crank, rods, pistons, cam and gears, oil pan and pump, front cover and a few various other parts. Block has been checked and shows no cracks. Bore is standard with almost no ridge. Crankshaft is standard and looks perfect. NO heads. We purchased it almost 20 years ago as a spare. Never needed it and don't need it now. I am Located in Highland Village, TX (just north of Lewisville, TX which is just North of Dallas, TX.
$400.00 OBO. Contact me at BPerrenot@hotmail.com or 281-687-1071. Shipping cost is on buyer, but we will crate/pack it for and take it to  a local shipping dock for you for $50,00. Can't beat that deal..