Metric monte axles the same as 80's camaro axles?

[enduro racer]

Our rules prevent us from running locked rears a I'm looking for a spare posi unit for my 7.5" GM 26 spline rear but can't find any at a decent price. Anyone have one for sale?

Also thought of using a 28 spline one out of a camaro since they're plentiful. i would have to change axles though. Would camaro axles work?

[stock car driver]

no on camaro and posi wont work long on oval track thats why we all run spools or detroit lockers