I think I would run with the 10.5-11.1 CR. Get the 270cc or equivalent head. Stay away from the cheaper heads. Go with the 119 cc head. The 270cc race rites come with the 2.25 an 1.88's. If the price scare you take a look at these prices
https://www.airflowresearch.com/ here. Hyd. roller would work to around 6500 or so. But if you go solid roller you are not going much over 6500.