Guess you'll be driving the beater (Vette) until it's done.
Neither of those links are shortblocks.
And you kind of answered your own question. Stock with bolt ons...okay
Option A: You get the same thing but you have to assemble it. Pay for machining costs...hot tank, flux, honing, balancing, and etc.
Option B: Already assembled and close to the same price without the time and machine cost.
What exactly was the question?
Go the Hard more expensive way of course Option A. After all this is Stangnet
Unless your mechanic has access to a machine shop or has all the equipment to check out the block. It still is going to cost more than the that short block.
Most people on this site would just find an JY Explorer motor and spray that.....mmmh myself included.
If the engine is toast and bearings material was bad enough it ate up the crank. Just go with the short block.
I understand the want to put new stuff in it, but without having the block checked out...you risk is less on the JY motor.
Lastly where do people buy engine rebuild kits
Summit, Jegs, TRE, DSS and more.
Budget kits are speed pro and scat kits.
You can spend a ton on a rebuild quickly. Imho explorer is the way to go, drop pan check bearings. Swap cam let it eat.