Yes but you require the front bumper brackets, and lower valance, signal lights and brackets. I have done it, can use 1976 hood with it also . 1977 and later hoods are flat and will not allow bumper to fit correctly
The rear bumper will not, the front bumper will with a bunch of modification including fender, core support , bumper brackets, lights, wiring harness and a hood with one from a 70-76 car. Save your self a lot of time and trouble unless you have time and a donor car.
No
I'm fairly sure that the 70-81 windshield is the same dimensions.
Yes but you well need to get new fenders a new hood new headlight assemblies and some other stuff
no considering the front is more boxy and wider in the front. the 1990 bumper is rounded to fit the 88-98 pickups , the suburban kept the box style until 1991. your best bet would be to find a 1973-1987 silverado,custom deluxe,cheyenne, or bonanza bumper or a suburban bumper from a 1973-1991 suburban
NO!
NO. Do not attempt to do so, as the bumper will be extremely unstable.
No It won't fit unless you use the 76 + windshield with it.
Yes.
Yes it will fit, They are exactly the same body style
Yes it should.