Nice ratios, certainly better than the Mopar-OD box! .The new numbers become;
Starter of 2.66 x 4.10= 10.91 Excellent
Second of 1.59 x 4.10=6.52, a reasonable second for a 360, but only ho-hum for a low-pressure 340.
And 60=4870 with 27s
Cruise gear of .80 x 4.10=3.28s ; So 65=2650 with 27s, a lil high but easier to make adequate cruise-timing with.
The gear ratios are a nice progressive 1-2-3 with a short Fourth, perfect for a 340;
2.66-1.59-1.00-.80od with splits of .598-.629- .80.. The Commando box, which I really like is;
3.09-1.92-1.40-1.00 with splits of .621-.729-.714
I think yur gonna like that Passon box. I'm looking forward to seeing how it works out for you