How much mg of Ephedra per serving did the Old Hydroxycut use to contain?
before all this ephedra free versions.

Several online sources confirm that Hydroxycut formerly contained 20
mg of ephedra alkaloids in each "serving" of three capsules.

"A serving of Hydroxycut and Ripped Fuel each contain 20 mg active
ephedra and encourage 40 - 60 mg ephedra per day for desired results."

The Banner Online: Community urged to beware the dangers of ephedra
http://www.carlisle.army.mil/banner/sept02archives.htm 

"Hydroxycut...
 Ingredients 
Hydroxycut Blend: Hydroxagen (supplying 1000 mg. of hydroxycitric
acid), MaHuang Extract( standardized for 20 mg ephedra alkaloids).
HydroxyTea Blend: Guarana Extract, green tea extract(standardized for
200 mg caffeine). White Willow Bark Extract (standardized for 15 mg
salicin), L-Carnitine tartrate.

Suggested Use 
Take 3 caps with a glass of water 3 times daily."

Club Hardbody: Fat Loss Meal Replacement Stack
http://www.clubhardbody.com/supplements/fatlossmrpstack.html

"Muscletech Hydroxycut...
 Serving Size: 3 Capsules...
Ma-Huang Extract (stem & leaf) Standardized for 20 mg ephedra alkaloids"

Nutrico Online: Hydroxycut 
http://www.nutricoonline.com/store/mthydroxycut.html

"Hydroxycut...

Ma-Huang Extract (stem & leaf) Standardized for 20 mg ephedra alkaloids"

Piranha Sports: Muscle Tech Hydroxycut
http://www.piranhasports.com/Products/Muscletech/hydroxycut.htm 

"MaHuang Extract (standardized for 20 mg ephedra alkaloids)"

USA Direkt: Hydroxycut
http://www.usa-direkt.de/adipokinetix.html

My Google search strategy:

Google Web Search: hydroxycut "mg ephedra"
://www.google.com/search?hl=en&q=hydroxycut+%22mg+ephedra%22

I hope this is precisely the information you need. If anything is
unclear or incomplete, please request clarification; I'll gladly offer
further assistance before you rate my answer.

Best regards,
pinkfreud

The researcher provided me exactly what I needed, I just need to
improve my web searching techniques.  Thank you for the expedient
answer.