Trouble is, from what I recall from a documentary about the show a few years back, those cars drive like cr@p!!!
Paul Michael Glaser apparently used to curse the thing for being so difficult to handle and pointed out that if you looked at the bit on the credits where they're chasing another car and driving in circles at an intersection, they're all over the place and frankly it's a miracle they ever caught *anyone*
Also, from
http://www.gotriad.com/article/articleview/7294/1/15/
' Glaser hated the flashy hot rod. Still does.
'â₠œThe producers chose that car,ââ‚ ¬Ã‚ he says. †œI didnââ‚ ¬Ã¢â€žÂ¢t think it was cool. I thought it was an ugly thing. And for two undercover cops to be driving such a loud, obvious car was rather silly. But the producers liked it, the public liked it, so that was that.ÃƒÂ¢Ã¢â€šà ¬Ã‚ÂÂ'