Use a 440 w/ stock exhaust manifolds (Headers aren't "sleeper"), and tuck one side of the exhaust up higher and only show one tailpipe out the back. No hood scoop. Column shifter, no gauges, etc. Maybe even turbo it.
Maybe something like this?......... I think you scored a very COOL car. Take wifey out parkin in it. The possibilities are endless with those back doors open. Mid life crisis, maybe, (If so enjoy the hell out of it:-D) but I,m sure she would rather you have it with a car and let her join in than with another woman. Emasculated...NOT!! Enjoy your new toy