The 340 is the biggest POS V8 Chrysler ever made.

No arguments from me with my 2.2plus 60fts,lol.
Jus saying 1.35hp/cube is a lotta motor, and a lotta money, and I can't imagine driving that everywhere all the time like you could a 71-340 Swinger/etc. with just headers.
Like you said; apples and oranges