General dimensions/weights for your 1965 Suburban are show on page 7.

About 4300 lbs curb weight with fuel.

~ 450 lbs engine (230 ci)
- rest of drive-train
- chassis-frame/wheels/tires
- seats
- doors & windows

My uneducated guess would be that the stripped-down Suburban cab wight would be less than 2000 lbs.

Wait to hear from other members.