Early 68 340 Block / X heads / 8.75 Rear and more

Sorry, I believe I failed to snap pic of that before I wrapped it up and stored. I’ve got to move some cars and things but will try to do so soon. In the meantime, I’ll look back at photos or see if I wrote down...
Stamping at back of block was tough to get pic, but appears to be a machinist stamp: 8PT3T 8(or)6 JJ(upside down) 3
Front of block below head pic below: Assembled Sept 5, ‘67...correct??
I couldn’t get to the pan rail #’s without moving everything out of the garage. Maybe next weekend.

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