Serpent6,
The rear-end ratio us usually stamped on a plate found under the undercoating/grime on the driver's side, between the driveshaft flange and axle tube. Ratio should be the first number.
If it's gone, I think the method is jack up rear wheels, put the trans in 4th. Mark the driveshaft, and turn a wheel one revolution forward, slowly. Count the number of driveshaft rotations per wheel rotation.
I always have trouble with that, but I've only done it on junkyard cars...
-if both wheels turn the same direction when you turn one; good on you, you've found a diff with limited slip.
Pertronix is available a few bucks cheaper and w/ free shipping from
These guys, but you need to know your distributor number: stamped or engraved on the dizzy body.
Have a blast; I put on dual webers before re-bushing the suspension. The creaks don't make it faster! At least I can stop now though.
Cheers, -Sean
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1966 122s, 1970 142s, 1974 142e... Blue is Beautiful
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