There are early hemi engines less valuable than others. The 392 is the most valuable, but doesn’t have the best cylinder heads- most folks shy away from the early 331 with the bell housing cast into the block- and parts are much more difficult to find for the desoto and dodge versions.
Any gen 2 426 would be a good find.
The best heads were the 1955 "555" triple buckle castings on which the early Donovan heads were designed. You'd never feel any difference in a daily driver...might see some on the Dyno.
