I have news for everyone here. Chrysler, pre-gen3 hemi, only ever made one actual performance engine for passenger cars. And it's not a small block. And it's not a 440 either.
There's 2 that I can think of. 340's were performance only. No 2 barrel engines in sedans or trucks. So, saying all that, the 340 and 426 Hemi were the only 2 that were "performance only" engines.
