1972 440 with 727

Hey guys. Been gone awhile!!!
I've stumbled across a 72 440 with a 727. It came out of an rv with 70,000 miles on it. I haven't got the casting numbers yet,but the gentleman told me it was a hi-po motor. I'm curious if this could be the case,and what would it entail if it were a hi-po. (enternal wise) And the main question, whats it worth?
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