speedster93b
+1y
i don't care for camber. front or rear, so i'd go with a solid axle. plus - its MUCH simpler. go with a toyota axle. i personally have a '69 yota axle, and its about 4" narrower than factory mazda.
for you to narrow your mazda rearend, i don't think you'll be able to do it. you could have a driveline shop do it for you, because i bet you don't have a saw that can cut thru the axle shafts. they're hard as a mofo and dull the finest of saw blades. (i don't know if you can even cut them down, you might have to buy new shorter axles) plus you have to cut off your brake drum flanges and shorten the tubes, and, making sure they're square, competently weld them back up.