An old set of 906’s, that have had a little port work. Dwayne was extremely kind and answered several emails, and looked at probably 100 pictures of my work trying to guide me through it. I am always very appreciative of his giving time to help answer questions and provide guidance. I was actually trying to mimic his 500 hp 383 he documented here several years back.

When I had the springs off today, I stuck a valve seal into the inner spring to see if maybe it was close to the walls, and had plenty of space.

Again, didn’t know if this would be a good application for maybe using a beehive spring. I still am thinking my rocker arm geometry is maybe the culprit. I also use the Isky springs on my race motor (451) and I spin it about 7,500 with a mopar 590 cam without any issues.