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

I would estimate from 25-40,000 . Depends on if you will retain original suspension , brakes , k member and fuel injection.

There's a great "play by play" 392 Hemi conversion with a Passon 5-speed on the site done by member RealWing in the Restorations section. If I was doing it , it would be my reference .

Its extremely well done!