yea he has a chaindrive pass side output, with the same 7.5 front diff as the 86-94 runners had here
A09B A is supposed to indicate 7.5"
09 is a 4.22:1 r&p
B=4 pinion
however in your case i believe A 09 B indicates 7.5 in front and 8 inch in rear
There is no 4.22:1 on Toyota. Mine has 3.91:1.