and I'm sorry but I'd checked many forums about problem with bracking after swap rear disk brakes. And 50% of people are sayed that valve prop must change on 40/40, and 50% of people are saying that I can use my stock rear drum brakes valve prop.
had it ane marks to check "what is it". sorry but I have one valve prop on my car :))
please check manufacturer part number, and I'll look it at catalogs