I've got 1 or 2 I could sell as rebuilt shortblocks or longblocks. Shoot me a PM if something like that could work.
I usually don't sell complete 6.4 long blocks or complete running, even if I've had them and heard them running. To much of a liability and no way to tell for 100% sure without taking the heads off.
We just tore down a customers 49K mile truck that ran and drove to the shop with just signs of pushing some coolant.
Once heads were off #2 piston has started to crack and number 1 lifter retainer had came out but it hadn't went to the cam yet.
If that had been a parts truck, the sales pitch of "49K mile complete running dgrop in" would of sounded fantastic, to someone.