Where can I buy a reliable remanufactured 318 for 1971 Duster?

I see a lot of talk about Blueprint engines - but they don’t offer a 318 and I don’t want the complexity of changing anything. Clearances are really tight in the engine compartment and I just want a simple replacement for what I have. I’d prefer to have my engine rebuilt - but I live in FL panhandle and I’m not finding any/many places available to pull and rebuild my engine within a reasonable/predictable timeframe. So ..I’m considering the hard decision to part with my original 318 and replace it with an engine from a reputable source. They are not hard to find online - but I don’t want to get something that I cannot trust.

I’m not after any performance changes - just something like my original engine. I don’t have the facilities to pull an engine myself but I’ve located a local guy who will order and install a crate engine.

Suggestions please for reputable remanufactured long block engine sources.