What size engine for the online/Youtube EC?

mgoblue9798 said
One comment on proposed rules, EQ heads are even allowed as factory replacement heads in dirt track circles running 500cfm carbs.

If speedmaster and eddy heads are allowed, then why not EQ and RHS heads?

Because they are no longer available and I want the rules to reflect that ANYBODY could have access to the parts to build a solid 360. J.Rob