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So - according to the chart above 3.73 was base; 4.10 and 4.56 were regular available options. Not special (other than being selected from the available offerings) and not beefed up beyond normal K20.
Aha!! I was looking at the "California only" sheet. That explains my confusion. Clearly CA has been "different" for some decades.... The good news is that I should no trouble getting gears that will work!!
Someone removed the grille brackets in order to make the earlier grille fit, so I had to get a new set of those with the grille. I like the early one, too, but the previous owner kept it, so I needed a new grille regardless.
Yes I will post that when I can get a minute to scan it. It's no longer attached to the glove box door, but it's in good shape.
Was the old grille pretty secure and fit well with the brackets removed? Haven’t looked at my truck(s) and don’t have a 73-74 grille to test with but they are super cheap now on Holley i think, website.
No, the 73-74 grille was loose and rattling around like mad without brackets. That's why I wasn't broken hearted that he wanted to keep it.
Thank you for posting that; that is what is known as a SPID label (Service Parts ID label). The build sheet is what the line workers refer to so they know which parts to put on. They are pretty rare which is why I was excited to potentially see one.
