The B engine was temperamental with any single plane lacking convertor and gear thus the bad rap.torker family of single plane intakes for big blocks got a real bad rap there for a while,
The RB saw gains on the upper end and didn't loose much torque on the bottom with the Torker.
The Holley street dominator and Edelbrock RPM are the best for use on the B engine, RB there are many that will work and not give up much.