You can run almost ANY cam on a OE 2bbl Cam and intake. How much it will limit the performance potential is another story. But you’ll know when you add a good intake and carb!
There was a tag installed at the factory with the gear ratio stamped on it. This tag could still be attached to one of the bolts that hold the rear ends cover on. However, RUST may have taken it away.
The only other way I know how to Absolutely identify the rear end gear ratio is to take the cover off and find the gear ratio stamped on the side of the ring gear. You’ll need to jack up both sides of the car and suspend the rear wheel in the air. With the front tires chocked to prevent the car from rolling forward or backwards, rotate the wheel until you find the ratio stamping.
2.76 - 2.94 - 3.21 - 3.55 etc...
Get a new cover gasket and a couple of quarts of gear oil to refill the rear. I use the Mobil 1 synth. 75/140 by itself, no issues. No additive needed.
