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Re: Yet to be named... ‘78 K10 Suburban
The NP203 is not as bad as every one makes them out to be. One plus is it has a better low then a NP205 (2.73 vs 1.96). They are picky on the oil used in them. ATF is to thin and gear oil two thick. It takes straight 30 weight as a lot of the chain issues come from using the wrong oil. As with any AWD vehicle the tires will need to be a matching set of 4. I ran a set of 10" wide rims on a truck with one and they wore the tires much faster then the narrower tires on the 7" or 8" factory rims. Also I wouldn't go bigger then 31" tires if running a 2.76 or 3.07. Check your SPID. If your NP203 is in good working order I wound leave it as is.
Also you should be able to get the Wheel Vintiques rims from Summit Racing and if the order is over $100 dollars ground shipping is free.
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AJC
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