[akafatguy]

Just bought a 1970 crew cab 4x4. I am considering this as a tow rig. It is equiped with a 390, np435 and 4:10 gears. I was wondering about overdrive units. I like the 4speed but and overdrive would be sweet. Is there and external available?
thanks for you time
john

 

[Rock Puppy]

Gear vendors makes after market overdrive and under drive units. They are a little pricy and make the driveline a little longer but they would be your best bet. or if your lucky find a wrecked 94-95 dodge diesel and swap the motor and tranny over... Ummm diesel...