The 340 is the biggest POS V8 Chrysler ever made.

Yep. And some were even higher. If you go through the old DC books you can see how NHRA factored the piss out of the Chrysler stuff.
A few times, right out of competition ! Walley Parks even apologized to Ronnie Sox for legislating the gen 2 hemi`s out of competition, years later. He put 600# on the hemi because Jenkins and the chevy boys couldn`t beat it . HE ADMITTED IT !