what to say to nit pickers at car shows

I was at a cruise in in the mid 90's in my 70 440 6pk cuda that was damn near perfect and I over hear a guy sat to his son"See that son, hemi's didn't come with six packs" I just let it go rather than embarass the guy in front of his son.
Recently I have been getting pissed off at the nit pickers on the Duster. It has a chain to safeguard if the motor mount breaks. It has been there since before I got the car in 97. More people make comments about than anything. One asshole even said " Maybe you should have it chromed" I watched him and his buddy walk to there f150 and honda motorcycle. I almost went off but i didn't. Is it ok if I use your dads line? That is classic.