Not sure, don't want to steer you wrong.
Could be a partial vin.
Could be a partial vin.
I currently have a 91 but still have my 74 vin plate for sentimental reasons! The 91 will have the vin on the dash look down through the winshield lower left hand corner. When i did the 74 i didnt remember the numbers on the frame matching the vin?? but it wasnt a priority back then. anyway i boxed my 74 it added a lot of weight and didnt really do much for stiffening, Leaving the frame as is and Increasing the cross bracing with tubing keeps weight down and leaves room for exhaust doublers also helps ALOT with keeping rust away. Boxing killed the frame,, trapped road salt and rust just got carried away, yes i used weldable primer it when i did it and yes i coated it afterward inside best i could and yes it was mirror clean when i did it,,thats just my experience. Thank you Penndot,,, brine on the roads before snow such a great idea.
That sounds the most reasonable to me. a regular 91 and a pilfered 74 tag and title.If it's from CA, you most certainly have a true 91 with a bootlegged 74 VIN tag. Someone would have done that to avoid smog.

Unless he plans on wheeling it and getting out of sticky situations with the skinny pedal, Dana 60 money could be spent elsewhere that really needs it in my opinion.I'd do an 8.1L swap, I would definitely put a Dana 60 front diff in it.
Often times learning means having to do things twice