whats the difference in shaft mounted rockers and stud mounted rockers are they the same. or do i have to have a certain one.

if i need a certain kind im getting trick flows ( http://store.summitracing.com/partde...5&autoview=sku ) are these stud or shaft ?

 

Stud mounts are fully adjustable and each rocker rides on a stud and uses guide plates. Shaft mount "may" be adjustable depending on vendor and the shaft installs to the head and holds the rocker. No guide plates required. Crane is stud mount, Yella Terra is shaft mount.

 

whats the pros and cons of them?

 

take a look at the crane poly matrix shaft mount rocker system. you must mill the rocker bosses, but very nice pieces