A '74 ande 78 are actually very different, it rather depends on when the '74 was actually made. However at around that time the car had a major safety upgrade prior to the introduction of the 240, Rear axle was slightly relocated, as was the fuel tank.

Door locks were changed too, it is possible to alter doors to make them fit, but it isn't really worth the hassle.

Apart from that you'd gain npothing much mechanical, steering, brakes, rad, alternator are all completely different

Regards


Pete

They pretty much are the same from the windshield back, although, there are differences in places. If you have a specific question on what may or may not be the same, i'd try posting it in the 140/160 section and we might be able to help. In that respect, the 75 164 had more in common with the 240s, although it also had some more, hard to get, specifically 75 only parts i think. What exactly do you want to swap from where to where? I agree with getting another 240 to pull parts from, much better idea i'd say. Especially if the 164 you have is considered roadworthy, gotta save every good last classic bit if we can. =D

My two cents, peace
--
Kyle - attending Ore. State, while my lil 68 142 (74 b20, broken m40) sleeps... (check out my cardomain site,kneedsacar