Is switching the earlier cars to the later suspension possible without cutting and welding?
It's been done. Lots of work. Probably not worth it. The early suspension is essentially built into a cradle that bolts to the body, while the late bolts straight to the body.
I am not sure there is really a practical reason to do it though. A stock 64 suspension (with transverse leaf spring / camber compensatory) is an entirely reasonable street suspension. If you go full race.. maybe, but early cars can be race cars also:
GTwannaB wrote: Was it 67 when the dual reservoir brake master cylinders came out?
I think those were mandated for the '67 model year on all cars sold in the US.
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