Rocker Arm upgrade guidance needed

[SSLance]

Thanks for the most generous offer Greg. From everything I've read, adding guide plates to a stock vortec head is a no-no... In order to go that route, machining on the head needs to be done as well as opening up the pushrod holes. I'd prefer to not crack the seal so speak right now, so my only choice right for the time being will be self aligning rockers.

Sounds like rockers for 3/8s studs are needed and my tall valve covers should clear most sets with minimal or no clearancing needed.