Five out of twelve of my My 302 GMC rocker arm adjusting screws have damaged threads and two of my tubular pushrods have come apart. I replaced the screws and want to order new tubular pushrods. I need performance pushrods since I run higher rated valve springs.
I need help with pushrod ordering:
1. Do I use total length from ball to top of cup? i.e. 10 19/32 in.
2. do I use effective length = total length - cup depth i.e. 10 3/8 in.
3. do my measurements look correct?
4. Is there a recommended performance pushrod make and model for GMCs?
