dynasty solid axle

I broke a rear spring mount on a '90 Dynasy - It had rusted to the point where a bump in the road caused the spring to pop out.

I'd like to have a new one welded on, but don't know if it can be done w/o removing the axle. An easier solution would be to use the axle on my '90 LeBaron parts car. Question is, do they interchange??

I find a lot of interchange information here: http://www.autozone.com/servlet/UiBroker?UseCase=L001&UserAction=viewHomePage. Enter your vehicles and compare part numbers.

does it look like you have a straight, solid beam on the rear of your car?