Mopar R3 block new Siemese bore!

Sorry to ask but..
59* or a 48*?

Both! You get 2 for the price of one! The cam journal is 48* size ( a regular small block cam won't work) and the lifter angle is 59*.
In all seriousness, these blocks were a mistake by whoever machined them for Chrysler....Like the seller said though, a custom cam core or machined bushings in the cam journals would make it usable.