[Will]

Bent pushrods are a symptom of a pushrod that is too weak for the spring pressure used, a lack of clearance in the valvetrain, usually coil bind but could also be a lack of retainer to guide clearance, or possibly contact with the top of the pushrod hole in the head.

What is the lobe lift of the cam? You said .616"/.621" lift - is that measured at the valve and if so, with what rocker ratio? That's a lot of lift for a street engine. Have you verified your retainer to guide clearance?

You also said .083"+ to coil bind. That's measured with the actual lift at the valve, correct? Was it measured with the retainer in place on the top of the spring? I've seen dual springs coil bind on the inner spring before the outer spring when the retainer is in place.

Are there any witness marks on the pushrods from anything other than the guide plates? What guide plates are used? is there any chance the pushrod is contacting the inside of the guide plate or top of the pushrod hole in the head?