Driver gear for outback speedway

same rpm & ratio diff dr. 2.jpg
 
What about SR champ and clone heavy?
First I must say I've never raced there, but based on size and 12.5 sec lap times for clone 375 on video I watched, you could start for Clone heavy with a 14/58 or 15/61 ( yes not the same ratio ) your choice, I'd start with the 14/58 and as long as my rear never had to go below a 57 to keep target rpm I'd stay on the 14 driver, If I had to drop rear to a 56 then I would bump up to the 15 driver instead. I'd have a 16 driver along.
Which engine for Sr Champ ? Animal, Flathead, or Clone ?
 
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