I'm looking for the size (diameter and length) of a normal stock pushrod for my 1968 429 Thunderjet. I want to order some extra strong (possibly performance) pushrods, and would like to know what size and where to get them. I have a rebuilt engine with a Edelbrock cam Duration at 290/300, Lift .556/.581, my heads are 8CVE and I would also like to know of a good roller rocker setup. Any advice will be welcome.