440 head numbers

JGC403 said

This might help. I found this article awhile ago. They flow tested 906, 915, 452, and 346 heads.
http://www.moparmusclemagazine.com/techarticles/5115_cylinder_heads/index.html

Click to expand...

Thanks for that. That is actually the very article I had in mind. All the open chamber heads are so close they might as well be the same. ...and the 452s win out in a couple of places.