Gears and gas tank

[jball1105]

Ok, I am going to once again show my ignorance....I wanted to find out what gears I have in my 63 Sport fury. I jacked up the rear end and spun the driver's side wheel. I knew that if the other wheel spun the same direction=sure grip, opposite direction=open gears....well what does it mean if the other wheel doesn't spin at all? Next to determine gears I was going to count the drive shaft rotations to one turn of the wheel, then I remembered I hadn't put the driveshaft back in yet.

I've been reading about EFI (looking at Fitech) and their instructions had a large caution about the necessity of proper venting of the fuel tank. Looking at my gas tank/sending unit (from spectra) I can't see how this is vented. Am I missing something that needs to be installed?

Thanks for all your help.

 

[khryslerkid]

If the other wheel doesn't turn, it's probably just your brakes dragging a little. It's an open rear.
Count the revolutions of the yoke if the drive shaft's not installed.
Mostly the gas caps did the venting on the older cars.

 

[watermelon]

im using an msd atomic on my 66 coronet. im using a vented gas cap like mentioned above.