New member interested in 1980 Sunline M-9 1/2 SBR

Hi All, I’m interested in researching some information on the 1980 Sunline
M-9 1/2 SBR. Specifically if it would fit in a modern 6.5ft standard box truck bed. I have a 2016 Silverado 2500 HD I’d be interested in knowing if this model would fit.
Thanks in advance!
Dan