225 Slant plastic model

An even cheaper (and non-Hyper Pak) option to the one in the megahobby link above is the Lindberg 1964 Dodge 330 model comes with both a 383 and a slant six engine. Like that one, it's small though, 1:25, but a whole lot cheaper than the 1:4 one. And you get a bonus car model to go with it!

http://www.amazon.com/dp/B000MNIVJM/?tag=joeychgo-20