Building a new 505 With Callies / Mopar Performance Block

The cam was selected based on using 1.5 RR and wanting to use the springs that the heads are supplied with.
A higher RR(more lift) will warrant a different spring package.

I’m not sure how the “E” HS rockers measure, but all the standard 1.5’s I’ve measured have checked out pretty close to 1.55 with full spring load.

Supplied springs are rated for .700” lift.