800cfm spread bore thermoquad compatibility?

from the passages in the carb base. In this case, you can Devcon or JB weld the passages closed for leak free operation. I have done this many times, never a problem.
Agree, the 850 cfm might be better, but the difference will be very slight & may not be noticeable. 454 Chevs, 455 Buicks, Olds, Pont all came with QJs that are the same size of the 800 TQ.