Ah, nevermind, I should have googled it first, sry to waste everyones time........
Short Block includes:
Block, Rods, Pistons, Crank and Cam Shafts, Timing Chain (I think)...in other words, the block and mostly internal hardware only.
Long block includes the above plus:
Heads, Intake Manifold, Water Pump, Oil Pan, Balancer, and MAYBE a few other mechanical parts external to the block depending on the distributor you use and the crate engine kit you order.
Hope this helps!!