I couldn’t even start to imagine

LOL, when you start playing with Hemi's, those sort of engine costs are just a walk in the park..
You can spend a bunch of dumb money on a hemi. I've built a few. To get big power out of a small-block that'll live for awhile....it racks up very fast. I'm doing a Ritter-block SB, right now. The only Chrysler piece, will be the timing cover.