Morning peeps, hows it hanging

?
Just a quick question.
Which reliant diff should I use? (gear ratios)
The one I was going to use has the letter B next to the serial number, which as I understand it would make it from a Rialto 2. Now the problem there (if Ive understood things correctly

) is the size of my wheels/tyres being 26.6" and the diff ratio of that axle being 2.78/1. Would this only serve to make any gearing problems worse? Would I be better off using a robbin axle with a choice of 3.23/1 and 3.545/1 ratios, or even a regal at 4.37/1

or have I got this all arse about face again
