The title says 07 Hemi Commander, which would be a 03-08 motor, Then it says 2010 5.7 eagle heads.

So what I gathered is that he has an early truck and wants to upgrade heads.

For all real purposes, the eagle 5.7 head should be treated the same as a 6.1 head, but with closed chambers. The intake port is much bigger than an early 03-08 5.7 and the exhaust is a d shaped port that works with a 6.1 header best.

The loss of quench is more critical to me than the gain of compression for this mild application. The 09 5.7 Hemi was at like 375 hp anyway. Add a cam to the early motor, be done.

All of these heads drop seats, some more than others. I've seen eagles and 6.1 do the same thing. Its luck of the draw.

Last edited by AlexP; 07/10/20 03:16 PM.

My Build thread: Let the hemi swap begin!

1968 wanna be pro touring whatchamacallit with some fancy stuff and a new roof skin.