Update: the TH400 was a 73-BC, Buick, and the internals are good.
The 71 cast 350 is a YP, cast rods, 4-brow valve reliefs look good.
had unported 1969 13's heads ( i can work with that).
Replacement Timing Chain was loose.
Lifters had minor wear, tossed.
Cam seems good, but 0.39" with 1.5:1, 0.43" with 1.65:1.
HEI 1112500 seems good.
Pulleys; Water, crank, AC seem nice enough.
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