You know, judging by the mating surface on the middle section, and after looking at photos in Cliff's book, pg. 29, 30 and 67, I don't think it is trash. I can see where the 'ridge' on the mating surface hits and it should be good.
However, I will prep and bush a spare b.plate and have it ready, in case my theory turns to tuning nightmare with vacuum leaks. Ha!