Being in on the SSC trials and tribulations of SSC in it's infancy, the spirit of the SSC engine specific rule is:
To first keep it low cost ($60 max), keep it stock (everyone is equal or can be with same investment $$), and keep the rpms down so the speed stays slow and survivable in midair action. Thus why the rules as written.
Now since SSC is in the provisional class state, and having what you have now, I turn the question over to you, what do you think? Is it the direction you would like to pursue the rules considering a no questions asked engine only cost $45.00 for hours of fun.
To play devils advocate I know modifying of SSC engines is currently being allowed by removing exhaust baffles, Enlarging muffler bolt screws, replacing OEM high speed needle valves with after market ones, once the original gets snapped off in a dirtnap. So there are grey areas, as in your case.
I would suggest you slap something together and have some local club combat fun. SSC is a blast when kept slow.......
Good luck, If your really want an answer straight from the horses mouth, "The originator of the 5 comandments", send an e-mail directly to,
[email protected]