my 73 dart was a street car that i ran at the track more than i did the street. just to man crappy roads around me and worrying about smashing my 8 QT oil pan.:violent1: lol. my 73 dart had a summit brand 27.5x19 2 core aluminum rad and a summit brand CVR drop in electric water pump. I tried the HHR fan but ended up using a 3.8 ford tours fan. it has a built in shroud, 2 speed electric motor and what i like the most the fan motor is off set to the drivers side.on high it floes just as much air as the HHR if not more. the only thing is it cost me $100 off eBay shipped. it had no trouble keeping my mid 10 second pump gas street car cool. but i would of still did the rad like you did for a little bit more room. I will see if i can find a old pick of my fan set up. Thanks Mopar65
here is the best picture i could find of the 3.8 ford fan. again nothing wrong with the HHR, just showing another fan that can be used.