ProComp/Speedmaster aluminum heads

I’d def have the springs tested.

The ones I had here, which were a dual spring w/o damper, that used 10* retainers and locks...... listed as for use with flat tappet cams....... had waaaaay less spring load than the specs that were just posted.


How were the springs that came in the Edelbrock heads. Are they better than what you have seen in the Speedmaster heads.