matching diffs

[Bruce Parker (RIP)]

Factory differentials were often changed by post war users. For example, 15 cwt diffs were put in 60 cwts to increase speed, and C8A's have two different ratios depending on date of manufacture. In most cases, diffs with different ratios plug right in so it's hard to know what you have.

Of coures front and back have to match, but I'd suggest taking things apart and counting gears to be sure.