fury413rb

i want to get a set of roller rockers and i was wondering if anyone had any good experiences with Proform rockers. They are generally cheap compared to crane and comp etc. Should i go with 1.5 or 1.6 ratio? My cam is 240/246 duration @ .050
.507/.510 lift with a 110 lsa
heads are 452s i think? close chamber 2.08 intake and 1.74 exhaust??
ill need to look they are from '64

any info would be great

allen