what's the verdict....

on summit brand hydraulic flat tappets?

I have 4500 miles on a set in a 440 and no issues.

Ran one of the cam kits for several years in my 400. No problems with it.

i'm thinking stock magnum cam and light springs may be ok,.... .

I had way better luck with the Summit flat tappet cam kit then with 2 Comp Cams kits. It just wasn't enough cam.

Used them in a few Mild builds and have had no issues.