M-code 440 vs H-code 383 differences.

I had a 68 383 4-speed car for a bunch of years, FF1 green with dark green interior, build sheet and fender tag, buckets but no console. It had a 383 and transmission case from a 69 Roadrunner. I bought it from a fellow near Gibbons north of Edmonton for 1000 bucks, it had a seized starter so we push started it. I drove it the 30 miles home, tore it all down, it sat for 10 years then i sold it in pieces. If it was a 69 I would be driving it still.