I am told that there were two types of differential, one with bolt on drive flanges and one with push fit CVs? Anyone know what these came on? specification/model year?

Im also told that 1.6 drifeshafts are smaller and therefore lighter, I assume this goes for all smaller models?

Apart from cosworths which have a difference in the brake caliepr mounts, are all the rear bearing carriers the same?

are all rear hubs common?

Many thanks for any help!