im trying to sell my roomates rims... have a guy with i think a 99mustang thats interested but not sure if they will fit

rims are 18"x9.5" tires are 265/35 & 265/40. pattern is wide 5. my roomate had em on an s-10 w/ adapters...

i know they will fit a truck but dunno if they will stick out and look too chuncky on a stang...

feedback please!!! thx