Castline has been cranking out their M2 Machines ’67 Novas for years. I have over 20 variations going back to at lease 2009. They are nice models, but it’s nice to see them switching things up a little bit. For Release 29, they cut a hole in the hood and gave each version a different engine. I found both variations of R29 at Walmart, my favorite of which has the black stripe and the stacks.