[Jmclendon]

Thanks for the info! If you don't mind me asking, what's the giveaway that it's a Stromberg WW?

I'm glad it's stock though, because at least I can be confident the shop manual I've got will be of some use.

I'm told it was rebuilt before I bought the truck. But, I can't prove it. The last time I took it into the shop, the mechanic tinkered with it a bit..... I've not been back since (that's a whole saga, but the end result is that I'd prefer to learn and do the work myself from now on).