To me a "crate" engine from Mopar is nothing more than a convenient way to ship all the engine parts at one time. Once you get the engine it is mandatory you have it totally disassembled and checked over by someone you trust.
So forget any price savings you might get on a crate engine.
I also suggest you ask around and do some research yourself and find someone local who has experience with Mopar engines.
I recently had a mild 440 engine built for my wife's Challenger.
Buying a complete high $$$ engine from a builder out of state wasn't even a consideration for me as if, and many times there are problems trying to get an out of state builder to take responsibility and make it right is impossible.
I did some talking to a few trusted Mopar friends who are local to me about engine builders in our area that are honest, affordable and know their way around a big block Mopar.
I found a guy who was highly recommended about an hour away from me.
He specialized in Mopar engines and runs all his rebuilt engines on his break in stand to make sure everything is working properly and there are no leaks.
I took my wife's 440 engine core to his place.
He contacted me after he inspected the engine and we discussed what I wanted and my options.
We made a plan as to what parts were needed.
He didn't try to sell my anything I didn't need.
I bought a Sealed Power total engine rebuild kit (with forged pistons) and all the other needed parts myself from Summit Racing(which is close to me) and new aluminum heads from 440 Source and took the parts to my engine builder who inspected everything.
The builder sent me daily texts and pictures of the engine's progress, invited me to drive over anytime I wanted to check things out.
I was able to be there when the engine was first started and run on the break in stand and he told me if there were any issues he would stand behind his work.
His prices were very reasonable and I am extremely happy with the results.
I'm getting ready to take another 440 down to his place to real soon.