More aggressive means it opens and closes faster. If you were to look at the duration at different lifts there would be less crankshaft rotation between the two points. Your stall speed under full power is what really matters. 3.42 may be ok to begin with but a taller rear gear would probably work better if you're building the engine like I described above .got it... Got a nice stall converter 3000 stall 9.5 from lonnie and 3:42 gear in the rear end. Can you describe your definition of small versus aggressive cam duration?
Sorry, but during this past engine catastrophe I have been taking matters into my own hands and learning alot.
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