Hi Al,
The Five Commandments for SSC were written with a great deal of overlap in the rules.

Regarding engines it is less than $60, advertised price; Bone Stock no mods; and must run MA 8X3 at less than 17,500. Also there is a claiming rule.

By the time all is said and done the really most important rule is MA 8X3 only, at less than 17,500 rpms.

Like you I have several RJL Conquests that would certainly not meet the rpm requirments.

I believe that if you come to tech inspection and prove that you do not exceed 17,500 rpm with a peaked engine running the proscribe MA 8X3 the CD will let you fly.

I would use whichever of the Enya, ASP, or MVVS that you prefer. You can control rpm with nitro content.

By the way where do you hail from?