Since I don't have any interest in going fast in a straight line, my idea of a sleeper street car would be a well setup drifter that looks like a standard car. My 32 was kinda close (apart from the munted rear quarter ) and I'm aiming to make my sil look almost stock from the outside was well:
Stock R33 wheels
Legal ride height (eyebrow heights and minimum clearance height)
reasonably quiet exhaust with simple single tip
black mesh in the front bar to take focus away from the cooler
stock looking interior
Yet underneath the stock looking exterior will be adjustable suspension parts, coilovers and big sway bars, mechanical diff, R33 brakes and a ~ 200rwkw RB20 setup.
It will be done in the usual idea of a sleeper, but built to go sideways instead of straight