I'm building a W900A right now. I would 100% take that small A cab over the B. I'm also short AF as well so it fits. I drove a newer Volvo and Freightliner a few years ago. Don't like the big cab as much.
Yes-in your case because of your personal frame size, the A cab works. But really a person that's
6'1" it's kind of cramped. I drove many years ago, yes it's a good looking truck but has it's down
sides for taller drivers.
*
Small difference was a big difference when it came to the B model series Mack's.
The standard B cab used for models like the B61 for instance had a flat floor pan.
The higher numbered B73/B75 and up with the larger radiator--those cabs had a
2.5" dropped floor from seat boss forward so it really gave much more leg room
for a person with taller stature although head room to roof was the same. But in
all Kenworth is ready for a major change, basically what they are doing is following
Freightliners lead. Kenworth only has 14 to 15% of the market and Pete about 15%.
As the piece of pie sets today Freightliner has almost 39% of the market. Kenworth's
piece of pie has shrunk very slowly and very little crust left to support the filling.
So really it's simple--sell trucks with your power plants and keep the money closer
to home base.
*
The PacCar MX 13 can be spec'd @ 510 horse & 1850 torque at 1000 rpms. That's
a fairly stout engine. Old D9's were hauled with mothing more than a 350 Cummins
rated at 1,100 lbs torque @ 2,100 rpm--and don't miss a shift.