E-street vs Promaxx vs 440 Source

Not to sound like I’m bragging, but A 500hp 440 built using reworked stock heads is a “no brainer”.

But not all reworked stock heads are equal.
They don’t need to be awesome for that level of performance....... but they do need to at least be “good”.

The heads should be done to a level that’s commensurate with the rest of the build.



I totally agree with the above and the same goes with stroker engines. If you younger guys never had an opportunity to read the early Mopar manuals that most of us old timers had two copies of and wore out the pages of. They gave us the blueprints needed to go by. In today’s society there is so much BAD info going around that it would be easy to put together a bad combo. Stoker engines with suck azz heads and small cams. Stock stroke engines with heads double what they should be running. So many questions are answered in those old books.