Thanks for the reply guys! It is indeed a NAPCO conversion, likely performed by a chevy dealer since the tranfer case mounts are riveted to the frame rather than bolted as with non-dealer retro-fits.
There is no napco tag on the vehicle, but I'm under the impression that wasn't a thing in the 50s. The axle does have NAPCO embossed in it's casting though. VIN indicates that it was produced in Janesville WI.
Block casting number is 3764476, date code is L 86, it also has marks saying "CON3" and "GM8" and "8 476". I don't know what those last three are but I'm assuming someone swapped this block in from a 1956 car.
Welcome to the Bolt, I live in Taos with 2 3100 1/2 tons--where are you??
Hey there 49 3100, I am living in Los Alamos... I checked out your old posts and saw a picture of your pickups! Very nice! Which shops have you done engine work with around here? I'm thinking about taking my block to Statkus in Albuquerque, but still need to talk with them to see if they have a good source for pistons & a cam.
I stopped at a car show two weeks ago in taos where I saw a '56 international 3/4 ton shortbed 4x4 with a 'silver diamond' straight six, practically identical to our 235s except mirror image... that was a really unique one. Have you seen that guy?
