I want to upgrade comp magnum roller tip 1.52 rocker arms on my sbc 383 with crane gold 1.6's.
Will the pushrod length (7.200, hydro roller lifters) remain the same? Plan to upgrade the pushrods as well and it would be nice to order them together with rockers to save on time, shipping and customs (to Europe).
Dont have any experience with full roller rockers. Is Crane Gold self-aligning (dont like the guide-pates) rockers reasonable choice?

The pushrod length should not change. Why dont you like Guide plates? They serve a very useful purpose. Only way I would not use guide plates is with Jesel systems.