If you don't plan to twist the engine to it's limits, I would go with the hydraulic roller in a heartbeat. Less maintenance for you and just as reliable. The hydraulics would still work fine at 6,500 anyway... 
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Mitch
1970 Chevelle SS
1966 Chevelle SS
1967 Camaro ss/rs
1938 Business coupe, street rod
2000 FXSTS, original owner, 13k miles
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