I just came across some interesting info from the Chevy trucks forum.
http://67-72chevytrucks.com/vboard/showthread.php?t=565919
For those interested, 'aerotruck63' posted some literature that explains a lot I think. It is a 1963 service bulletin that list the c10-20 suffix-N with a 230
the k10-20 suffix-J with a 235
the k10-20 suffix-LB with a 261

https://plus.google.com/photos/113840717762774560215/albums/5850749337022566817?banner=pwa (page 5)

And a second one he has listed with the same info;
https://plus.google.com/photos/113840717762774560215/albums/5847055909458411057?banner=pwa (page 4)

Very cool stuff!

Mike


Last edited by 63k10; 09/20/2013 12:21 PM.