My brother is getting Lt1 350 cam with 498/498 lift for his RS. Can't stock heads only handle 480 lift, so the only thing he needs is new springs right? It's a roller cam by the way. Is it ok to use the stock roller rockers?

 

buy new springs and retianers, trash the factory rotators, check the clearance between the guide and retainer, check installed height too, shouldn't have any problems. you mean the gmpp rockers, made by crane? i'd run comp steel rockers on the street ,or strip since they're lighter than aluminun

 

I mean the factory roller lifters, sorry.