big block swap stick or faq?

I'm not 100% sure on year. I won't have the cash till Friday and already bug the guy twice. There's 3 or 4 440s around here from 325-500.
And 1 or 2 400s
1 413
1 383
An several motor homes with the not so liked big blocks.

As for a rebuild,
I will pull the heads before I buy it and check the bores as there isn't any machine shops around close that I know of.
Bearings will be changed
Cam springs and thinest head gasket I can find
Good carb and intake
Mabey a little port matching.
That's basicly it unless a used stroker kit comes up for sale dirt cheap