The swap on a GS300 or SC300 is very easy as they came from the factory with 2JZGE's (non turbo version of the 2JZGTE) so all the motor mounts line up, etc.
PRVT JET, Supras like I own are just Toyotas, Vipers are just Dodges, Vettes are just Chevrolets, etc. All cool cars in my book as is...