Fellow Rotarys';  I wend out in the garage and dug out the crossover
manifold to check the fit.  I purchased the engine from Dave and the ports
are about 1-5/8" in the engine, and the manifold is approximately 2 1/4".
Does any know what year the engine is?   One other question, what are the
round holes in the rotor housings, between the intake ports.  There appears
to be some o-rings to install in these ports before the intake manifold is
installed.  JohnD            Don't Archive