Engine and axle decoding
 

I have looked at FAQ and went to sites, but cannot make heads nor tails of what I have.


ENGINE markings passenger side front lip of block

10925WA on one engine (1968)

131161826 K02 12 CKL (1971 but think truck was originally 6 cyl)


AXLE

HA1026 W2 on top on the pasenger side of pumpkin - 70 Longbed

Code WA
 

If it's a 68 it could be a 307, but probably a 283.HA is a 373 single track if it's a 67-72.

i think WA is a 283 in '67 and 307 in '68
HA 3.73's

some one correct me if I am wrong.

LOL beat me to it!

Where, on the engine, that would should the actual year since you cannot count on just the truck's year?

And I know 3.73 is better than 4.10 or 4.11, but should a person find something closer to 3.07 to get better gas mileage?

Go here for locations
http://www.mortec.com/location.htm

Codes
 

On the intake or check on the back of the block for the block casting.