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so I'm not sure why 10.5:1 CR is really needed?
It's from the alum heads wicking away the heat much faster, may or may not want (measured) 10.5 but for sure higher than 9.5. higher CR is more squeeze and one of the main parameters of an eng's power and anytime you can run more w no probs def do it & w you being in the planning stage this is the perfect time. If you build a spot on long block then any addition/change/mod in the future IE cam/carb/intake/ign will only compliment your thoroughness w nothing left on the table. Measure the actual deck height/head CC's etc & go from there. Holler how it turns out for you
live every 24 hour block of time like it's your last day on earth
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