[bandit86]

Well if not impossible, really really hard

info: 1970 Unimog 406. 110 hp 5.6L diesel inline 6 witha 6 speed transmission. 6.5:1 gears. Originally engine governed to 2500rpm, current engine to 2800 rpm. Has 40 inch tires and a top speed of 85 kms per hour. I can play with the governor to top it out at 3100 rpm max. Fuel economy? Hahahah.

So, the mission is to make it highway friendly. 8000 pounds of truck. The tires are weather cracked so I need new tires. I'm looking at 395/85r20 tires. Either Goodyear mvt ot Michelin XML. They are 46 inch diameter the Goodyear looking like more street friendly and the Michelin more offroad inspired. I like both. Not sure which to get.
The air filter is oil bath, that has to go
it would need a 4 foot airdam to get close to th ground so that is out.

Suggestions and ideas? This is so underpowered I slow down to 25mpg on hills that my passable doesn't even notice