And many thanks to both of you from one of the novices. That's good info. I am still planning on running 2 NOS matching tag Rochester B 235 carbs on the 261 stroker that is my current project. My neighbor, the guy who will be doing the assembling, sez he can make them work well and not leak. BTW, a couple of years ago, he also suggested that I used 2 tag matching NOS carbs if I could find them. It didn't take long.