He may be referring to swapping to the pair of gears in the trans. IIRC the 13/41?? set is the one that was in Carters and some others at some point that provided excellent bottom end and gave you an overall ratio that didn't need the 39 T on the axle for climbing. To make the change would require two gears.
(Tom/SYC and CKAU probably know the numbers better than I off the top of their heads even though it was in the engine i had on the Rockhound.)
|