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I can buy this 454 block and heads for 100 bucks from a friend. Can you tell me anything more than I already know? Here's what I've got...

Block casting # 3999289
72(73?)-79 2 bolt
Casting date K 24 72
"Hi Perf Pass" on rear of block
"Pass Perf" on front of block

Head casting # 353049
73-84 Oval, open chamber, 122cc chamber, 255/119cc ports

Bore is just about 4.28", so it looks to be .030" over.

Good block for a mild BBC build?

Thanks!
Andy