Thanks for the welcome, and the reply. I didn't know what Chevrolets record keeping was in this time frame, being more familiar with the lack of production break down on the sixties stuff.
Any educated guesses on this car (truck?). It had every option possible in my recollection, if there is someone who is into build sheets of these things, I can provide a copy.
Dan Carr, who ownes three fairly rare, restored, El Caminos and GMC Sprints has done some production figures with options included for the 1968-1972 Chevelle, El Camino and 70-72 Sprints.
Here's a link to Dan Carr's El Camino and Sprint data:
I know of no one who has researched 5th generation El Camino production option (RPO) totals. Generally, even less research is available for the GMC Caballero.
There are a number of us on this board who can break down El Camino and Caballero VINs and "build sheets".
It has previously been stated on this board that 5th generation 4-speed equipped El Caminos were considered rare. That is likely to be even more so in the smaller production numbers of the GMC Caballero.
I'd be afraid to venture a guess as to the percentage of 5th generation El Caminos and the GMC Caballeros that were produced with 4-speed transmissions.
Good luck with your research. Please keep us posted.