Hmmm, They were all
4V by the compliance plate. If you mean that it has proper
4V heads, then there wouldn't be many, if any, that came from the factory like that. It would be very hard to prove nowdays anyway that the heads are fatory original.
I'm also not real sure on the delete vinyl roof either, I can't see Ford putting the work into it to make it look presentable. Some more info and pics would be great.
Cheers,
Dave.