Hi
This is not a MucleCars but an Acadian Beaumont GTA
made in Chile
1969 1970 1971 with the same body (1969)
http://www.tuerca.cl/articulos/2004/agosto/acadian/
http://paisa.vtrbandaancha.net/acadian/
under licence of GM Canada
SD 396 or only with a 6 cyl