72 Dart Swinger 3.6L Pentastar +T5

TT5.9mag said
That would have to be a very efficient (read incredible) blower to achieve those numbers.

LOL Really???? Care to share your source of misinformation?

Because, +40% increase is the norm & not at all "incredible".

Here's the receipts:

Edelbrock's supplied conservative CARB legal 91oct tune shows ~+41% 317whp vs ~225whp

Here's another guy's with a gain of +46% whp 226whp to 330whp

Here's the lowest gain I can find.....just under a 40% whp gain.