How much did it cost to cost to swap in your hemi?

I was at a car show three years ago, a guy had a used 392 installed his 69 Charger, it cost him $22,000 installed. The shop that he had it done at chopped up the original wiring from a wrecked newer Challenger. He did keep the 727.

I was looking to have these guys install a 392 crate.
https://www.bouchillonperformance.com/