the spring perches are 1/2 inch narrower and no dont just squeeze it in.
the shock mounts are a little different, but not a big deal.
some older ones have huge external hubs or drive flanges, but the later ones are just liek chevy. one axle shaft is slightly shorter, which narrows the whole axle by a little bit. not much to be worried about.
for the most part its easy to swap in just not as easy as a chevrolet 60.