You know...there is another way.
but first..an introduction, what makes vehicle A year x?
Farme? cab? body?. No to all. what makes a vehicle a 76 instead of a 79 is the vin plates and associated title.
Shop around for a junked 76 or older and buy the title and plates, even from out of state...doesn't matter, transfer (rivet) them to your 79, go register it.
Win win.
Done that a few times over the years, never had an issue, once the dmv inspector (Reno Nevada) even complimented on the "good job"