I am probably the only one here that likes Rochesters.
There is at least 2 of us Dave!
I'm got a 'B' from a '67 C50 on my '60 235 C10, runs strong & smooth. As far as fuel leaks I've had good results using very light film of loc-tite Pipe sealant w/ teflon on either side of the air horn to fuel bowl gasket. Can't be too badly warped and only a very light film of sealant on gasket. Advised one guy to try this & he brought it to me with sealant in passages, little thinner next time!