large port commando heads

The race W-2 rocker gear will interchange as will the W-5 stuff, infact the W-5 spacer blocks are used, and the W-5 offset shafts. The spacer blocks for the W-2 are steel or cast iron and don't mix aluminum with steel as you know which material will win the wear test. Not to say that they will be moving back and forth but the electrolsis of 2 different materials composites. It may work for a while but just beware that the aluminum will be wearing, or deteriating first.