1976 c30 Cummins swap

Is it your personal truck? I'd love to see some more pictures of it. Under the hood, under the truck, interior, etc.


I've only owned regular cab trucks and I want something I can put more people in, but I want good mileage too. I feel like a C30 3+3 with a short bed would be perfect :D If I can get an average of 19 mpg out of my K30 with 4.56s and 11.00R-16s, I should be able to get near 25 with a C30 and some 31s with 3.73s!

What kind of mileage can you get out of that dually?
 
getting ready to do a 12 valve swap into a 72 c30 mine came out of a 92 dodge plan on using trans and tcase as well converting it to 4x4 also my question is what gear ratio works well stock dodge was 3.08 I thank trans is a 727
 
What size tire will you run? The highest gear you'll likely be able to use is 3.73 if you use GM 1 ton axles.
 
I'd use a different transmission honestly. One with overdrive, like a 47RH. It will also work better towing since it has a lock up torque converter and won't build as much heat. 3.73 gears with a 235/85-16 will work out nicely. You'd be about 1850-1900 rpm at 65 mph. That's juuuust right.
 
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