64 chevy 2 leafs

did the 64 chevy2 come with monoleafs? Whatcha know bout that year 10 bolt rearend?

i have a copy of an original sales brochure and this is what they advertise:
Exclusive, proved Mono-Plate rear springs with diagonally mounted shock absorbers in the rear. Result: a ride that's stable and quiet. Mono-Plate rear springs can't squeak and never need lubrication. word for word. 10 bolt, don't know a lot about.