65 and later moved the engine back about 1 and 1/2 inches, (am not sure about the wagons) I found out on my 64 bel in 1975 after I found a crack in the K that was in the car, it was fun putting it back together with the 67 X K-member, but to the question, even then when there was still a lot of those old cars still around, there wasn't any headers that fit right, even then. we had to beat the hell out of the two front tubes for clearance, both sides if I remember, but now this last set of TTI s would have cleared with no mods, finally after almost 50 yrs but alas, two Kmembers to late!! If you change the K to a later K ,you can use the headers without mods, if you use the early K your choice is which hammer to use. Dave.