While driving my 1996 chevy blazer stalls out,repeatedly, what would cause this to happen

Measure the lenth of both rear ends. see iss all hardware will bolt up without fabrication. if its the same size it will work. But im afraid being a 4 wheel drive it will be geared lower then a regular pick up/ Drive shaft may work but if not it would have to be shortened or lenghthebed. alot of work. Brakes you could leave the non drum breaks on better stopping power. I honestly believe you would be better off just going to a scrap yard and find one very easy to remove and replave few hour job.

A car stalls when the engine receives a sudden massive increase in load (think when you were learning to drive - releasing the clutch too quickly would cause the car to stall by transferring too much friction too quickly from the gearbox to the engine)
If the car only stalls when you are setting out from stationary then better engine/clutch control control is needed, or there is a problem with fuel or clutch. If it is an old car, try putting more choke on when pulling away.
If the car stalls all the time, the general reason is that there is probably either a fuel or an ignition problem causing the engine to cut out. Of course, there could be any number of things wrong with your car if it stalls during normal driving

baty light comes on because its not running the stalling cd several different thangs

indicates a EVAP venting problem
have the fault codes read to determine the exact reason for the problem

replace the fuel filter

ck fuel pressure. I'll bet you need a fuel pump.

the computer

WI replace the wheel bearing and put brakepads on.This is when the problem start...When I am driving I hear a stumping and humming sound. 1996 CHEVELETE BLAZER . YOU CAN PUT IT IN FOUR WHEEL DRIVE

It is inside the channel of the frame rail under and to the rear of the drivers door.

The problem sounds like the solenoid that locks up the torque converter. This will not set a code or turn on the check engine light. The car will restart each time after it stalls. This will happen when you are comming to a stop or turning a corner. At times, you can start the car in neutral but when you put it in drive or reverse, it will again stall.

This can also happen after you have driven the car and parked it. When you restart the car, it may stall when you try to drive it because the solenoid is still locked from when you pulled into the parking spot.

Try to free it up by driving the car about 32 mph in drive (drive with the square around the D) where the overdrive and lock up torque converter will work. At 32 - 34 mph, pull the shifter down to the next Drive (D without the box around it) and you should feel the bump of the torque converter unlocking. Then put it back into the upper drive location and you will feel it lock up agian. Repeat this about 20 times and see if this does not help. These can start becomming mechanically "Sticky" and cycling them 10 - 30 times can help.

There is also a 6 wire connector on the forward (front of the car) side of the transmission. This connector might be dirty. Clean it with electrical contact cleaner (spray type) and reconnect it to the transmission. This connector is probably not the problem but worth lookign at anyway.

There is also a small port in the valve body of the transmission that if plugged, it can cause this problem. I feel it is most likely a "Sticky" soleniod that locks up the torque converter and makes the car stall just like comming to a stop in a standard transmission car without pushing in the clutch.

Good luck,