My 69 sits much lower in back and has 235 70r15 which in Cooper Cobra are listed as 27.91" tall, 255 60 r15 are 27" I believe. I'm View attachment 1715140846 not 100% sure but I think 67-69 Darts have similar wheelwell to 70 and up.
hi , any chance you could measure the gap between the tyre and the front of the rear wheel arch ? im hoping to fit 28'' tyres on mine but i know it will be close .