Interesting: "GM has been slowly phasing out its Gen III LS crate engines since 2019 to make room for crate versions of the newer Gen IV LS".
Searching GM's website for the basic 350 crate engine requires you to select a local business which happens to be a Chevrolet dealership.
So my guess is GM only has a limited supply and is reserving them for the dealerships.
You also have to factor in the virus and labor shortages hitting GM.
The crate well is running dry.
The only new (long block) 350 JEGS engine is the heavy duty L31 made for trucks. $4,068.99 w/ free shipping (also on eBAY).
