A note on increasing the front drive rate.
As mentioned gearing the rear sproket lower will help close the gap and engage the front earlier, my 530 had a 13/9 front and a 16 tcase input, 45T rear for about a 67% underdrive rate, going to the 52 rear sprocket raised it into the 70% range.
Then I tried the 13/10 front countershaft and 15 tcase input and am at about 80% (same length 420 chain), great in the deep snow on studs, but tends to climb out of the rut a bit too early as it hardly takes any rear spin for the front sprags to engage...
I may go back to 13/9 and 16 for summer (offroad) conditions. Put a 49 on for local dual sporting.