I was looking on
http://outintheshop.com/options.html and saw option L53.
L53 : V-6 DIESEL ENGINE - 2BBL CARB
and this
M38 : 2 SPEED AUTOMATIC TRANS. - TH 350
I thought TH 350's were 3 speed?
OK, I'm done nit picking.
If I get a new SPID I will definitely install this option on my truck
N12 : SINGLE EXHAUST STACK
Did they have dual exhaust stacks?