I used these springs: https://www.compcams.com/dual-valve-springs-1-509-o-d-outer-697-i-d-inner-3.html


Max Lift: 0.665
Installed Height: 1.9
Coil Bind Height: 1.175
O.D. of Outer: 1.509
I.D. of Inner: 0.697
I.D. of Outer: 1.125
Spring Style: Dual
Spring Rate: 395
Seat Pressure: 111
Damper: Yes

Well, dance around may be a bit strong. When it got up close to valve float the engine began to wiggle around.

I was eyeing the Holley datalog. Intake air temp was hovering around 130 degrees.
Yeah, the cell was a bit warm.

We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon