Case_man,
I have also read that the "CE" was used after 1968 on most all warranty/replacement engines regardless of displacement, and the numbers don't seem to come up as anything helpful. You may have to get the casting numbers off the rear of the engine to know for sure, and they may be very hard to see in the truck.
TruckNut
Be kind, courteous, cheerful and helpful - And someone will take advantage of you.
"Quiting smoking is easy, I've done it hundreds of times." Mark Twain
| 
