Yes it came factory with a shoulder belt
no
YES.
It should be a 700R4
1900pounds
31/10.50/15
no, they have different bellhousings and oil pans
they work fine in my 1984 3/4 ton Chevy with a 383 stroker.
replace the worn parts.
Yes.
One can find reviews about a 1984 Chevy Custom Pickup Truck on Kijiji. On Kijiji, one can find reviews of almost anything, including big pickup trucks.
The rear brakes on a 1984 Chevy truck are drum brakes.
yes, as long as it has the same box syle body like an 84 silverado would have.