ECA itself is not catabolic and should not cause lose of LBM. If anything it's supposed to spare lean body mass.

It doesn't seem like you know a whole lot about ECA so you should read up on it first before using it.

I have used it a lot over the years probably since 1998 or so. I wouldn't use the aspirin.

Start by reading this:
http://en.wikipedia.org/wiki/ECA_stack

Then make sure to read the studies referenced, especially this meta-analysis:

Efficacy and Safety of Ephedra and Ephedrine for Weight Loss and Athletic Performance
http://jama.ama-assn.org/cgi/content/full/289/12/1537

You need to be fully aware of what you are taking, the benefits as well as the side effects and then weigh the risk and decide if you should be taking it.