What would be the stock gear ratio Chevrolet put in a bone stock run of the mill 1970 El Camino with a smallblock 350, and a 12 bolt rearend???  The car is nothing special just a run of the mill car.  The badgine says 350 on the car.  Any idea's?  Trying to find out for a friend who is getting ready to start fixing it up and so he can make a plan of action to get the car how he needs it for his purposes, he needs to know the rearend gearing in it.

Michael

P.S.  I can be reached directly at redneck_chevy_psychopath@yahoo.com

you'd probably be better off, taking down the ID number and searching it up...go to Barnes and Nobles and look for a book. Might even find it online...  

If it is a posi that hasn't been tampered with there should be a metal tag back there bolted on it should say, but other wise the #'s game or one of those dial wheels from Summit, just being a plain jain doesn't mean much because people could get what they wanted at the time wish your friend luck. Sorry I'm not much more help The 73 I once had had a 308 I believe,  

If it is a posi, you can jack up the rear, put the trans in neutral, and count the driveshaft revolutions for one revolution of the tire.  2 and 3/4 revolutions of the driveshaft would be 2.73.

Tom