CH, as far as I have seen, the #666 is the only factory version I am aware of. I can't imagine not using that casting for more variations, but then again, it is a VERY OBSCURE form of motorsports that it is based on.
This release, featuring the HUGE front cow catcher is a small block , open wheel modified on pavement running in "Figure 8" style races. James raced them on Monster Garage at Irwindale Speedway. My understanding is that they remove the oversized front bumper and run standard oval races as well.
But in the world of "Modified" race cars, the original factory casting is very unusual. Most cars falling under that category are IMCA dirt mods ( mid west and southers) the D.I.R.T. big block style mods from the hard north , or the Nascar pavement style mods ( what are still called Featherlites after a series sponsor) from the mid to upper east coast. This casting is none of those, but a west coast pavement mod with a very limited following. So I just don't know if we will see this casting much.
Can you imagine the number of units you would need to sell in a single casting just to recoup the tooling cost? You need multiple release to help spread the burden out. This is far more detailed them any $4 casting I have EVER seen. But that is why I had to bring it into the more traditional dirt look.