1960-66 napco trucks

[padresag]

Originally Posted by 72GMCK-2500

That makes sense but didnt that put more wear on it being a 6? But i guess them low low gears didnt work it to hard. I was flipping through an old wheels of time magazine and saw a restored 64 C80 with the factory 409 with the 5+2 combo. It was a single axle tractor

your talking 2 different applications of vehicles here.
the Napco vehicle is designed and built for offroad use not as a highway cruiser. the other is capable of higher rpm's and different gearing and primarily for use in town and on the highway
those i6's could stay in those lower rpm's and just lug away all day .
I did sell for IHC and Pacific Truck and Trailer back in the mid 70's and did spec out off hiway units. also had a HD Hayes hauling logs off road
here is a pair of Pacific P510's that I sold in 74. bothe were carrying over 100,000 lbs net on a tandem axle trailer.
this was their inaugural trip out.

By rondavid at 2010-11-19
they also made the front of the pacific brochure

By rondavid at 2010-11-18
ron