FRom what i've manged to find , the the 22f-510 is be 65 AH , quiet good http://www.scavengersupplies.com.au/...batteries.html
compared to d34 = 55AH or d35 = 48AH ,
Plus you'll have 150 bucks in ya pocket or you could do a dual battery set up for a yellow tops price 2 x 99 + wiring = ....