The info you have posted points towards on an original L78 car with the TH400 trans. I think you have a typo for the block casting number...should be an 854 block, you repeated the cylinder head number.
the radiator tag [ZE] is a winner and a hard to find item...all the other stuff [carb/dist/tranny] lines up pretty good. Somebody added a small block radiator top plate...all the BB cars had a rubber flap with plastic pins [70].
Engine bay photo shows the low profile intake and other BB features...
does it have a 5 blade fan???
if you check the trans near the shift linkage you may find the VIN on the pan rail...later cars had them on the bell housing.
looks like a cool car...more photos pleae
