I'm using a Champion in my '70 Road Runner. It did not fit all that well & I had to drill some new holes in the radiator support to lower it. It now has about 1" of the top tank exposed below the top of the core support to JUST BARELY have the Champion (non-vented) radiator cap clear the bottom of the hood. I hacked up my 26" reproduction fan shroud big-time & made some attachments out of aluminum sheet. It looks decent once installed and it cools well, but it is NOT a "bolt-in"

70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"