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| My understanding is they have such a torque curve you only need 5 speeds. I was told you waited until the pistons started changing holes before you downshifted.. The one I was around turned 28+ which would help also. I have no idea if that was factory rpm. Most are not super fast on the road of that vintage. Back in the day I knew a guy had one.He could mash the throttle and get one front wheel off the ground.
I don't know about the locking rears. Odds are it is a Hendrickson suspension of some type. It could be a walking beam or rubber pills. Either way it will ride rough.
Edited by IADAVE 9/11/2017 21:11
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Mack R600
