RV8 style exhausts

["James J." <m1garand@speakeasy.net>]

All,
   I'm starting to prepare my empty engine bay to take the Rover 4.9 
engine, which is getting ported at the shop.  Is there any reliable way 
to mark and cut out the required openings in the inner wings to let the 
RV8-style headers pass through without having either the engine or 
headers in my posession?  Any templates out there?  I don't want to 
(read: can't afford to) buy headers right now, but I still want to get 
the engine bay prepared.
   Also, do I need to reinforce the circumference of the openings like 
they did at the factory, or is that overkill?

Thanks,
James J.

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