I've been working with a company to get complete roller rocker setups built for an affordable price. I have done just that. These will be BOLT ON. They consist of new 8620 steel billet rocker shafts, tufftrided for durability, 7075-T6 Aluminum extruded and hard anodized roller rockers with bronze bushings, and the rockers will be positively located by circlips. It appears that I will be able to get these to the market for with a price of $550 or maybe less. The first sets will be 1.6:1 ratio, there will be options avaiable later. You will not need to cut, grind, beat, or bang on the rockers or the heads. Just remove the stock rockers and shafts, and bolt the new roller rockers and shafts on, then adjust your valves. These will be built for extreme endurance, they share their design and manufacture technique with rockers that run 9000 RPM in 24 hour races.