I checked my rear end ratio today and its a 3.90 with NK1018 numbers on it. The engine block number is 3835911, Head 3835913 and serial on block is 0059235F55X. The trans is very oily and has alot of grease caked up on it but I got the numbers GM 14 3846122 1237 off of it. My eyes are not as good as they once was up close.
The overdrive wiring is in bad shape and is not fully connected so I don't know how long it hasn't worked. I have just started on this project but I already like what I see. So far I have determend its a 55 1 series 3100 five window delux cab with 235 engine, 3 speed w/overdrive and a 3.90 rear. Tires are 6.50-16. From all I here it should make for a nice setup. Thanks for any help.
55overdrive
