You are not alone in wanting to see popups.
Have you seen the new Lister Bell replica? New company, but the people involved have a good track record and seem to be doing a cracking job. Would be the easiest replica to put together so far from what people have seen of the panel fit etc.
http://www.listerbell.com/gallery.php?gallery=build
Alfa V6 is still the common choice as it is 60 degrees and sounds right. Supercharged is a bit mental though... I like that
Edit to add:
Just found the albums feature in my profile. Here is a piccy of my car to make you start planning your build right now
Apologies for the image quality, it was taken with my phone.