
Just to help you read this easier, here is what each of those configuration abbreviations mean.
MWB LR = Medium wheelbase, low roof
MWB MR = Medium wheelbase, medium roof
LWB LR = Long wheelbase, low roof
LWB MR = Long wheelbase, medium roof
LWB HR = Long wheelbase, high roof
LWB EL HR SRW = Long wheelbase, extended-legth, high roof, single rear wheels
LWB EL HR DRW = Long wheelbase, extended length, high roof, dual rear wheels