PanteraDoug,
Re you question about putting the "roll bar" in the engine compartment, you might consider integrating it into your engine bulkhead vs mounting it seperately outside of the bulkhead. You can get the additional interior room but also benefit from a stiffer chassis.
As shown in the pictures below, my cage is actually an integral part of the engine bulkhead/opening.
Re your question about roof scoops, I'm not aware of anyone that sells these, but mine might give you some ideas. It was fabricated to connect to a custom airbox via (4) pipes.
Regards,
Dave
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.