a seasoned block is one that has been used. it has been through several heat cycles, and has stabilized dimensionally. that means the block is less likely to twist, core shift, warp.
a short block is where you take the bare block, add the rotating assembly, cam and lifters.
a long block starts with a short block, adds the heads, and the rest of the valve train.
a crate motor is a long block where the venodr adds most of the rest of the components like oil pump, oil pan, dist, intake, valve covers. you still have to add a carb or the efi system, headers etc.
ask all the questions you want. just remember there may be ones you wont get an answer too, like can i date your dog or something like that.
