The real question is WHY?? The 63+ Rambler suspension is basically the same as the Mustang II. It does have upper trunnion joints instead of ball joints (lower arm has a ball joint), but that isn't a problem. The upper trunnion rarely gives problems and it's easy to replace if it does. There are easily affordable disc brake options. Scarebird (Scarebird Classic Brakes LLC
) makes one that will run about $400 with everything. The thing to remember is that ANY AMC kit will fit Ramblers back to 1950, all Nash/AMC back to 1952. There might be some minor mods, like a little grinding or spacing for clearance, but most need nothing. Aerospace Components makes a really nice four piston brake setup if you want to go show. Again, it's listed for AMX and Javelin, but I can guarantee you it fits the older Ramblers like yours. On the big Ramblers the spring towers don't get in the way of a V-8 installation (nor the 64+ smaller American, just 63 and earlier). They were made to mount the AMC GEN-1 V-8, which is close to the same size of a 396 Chevy or FE Ford. A big block will fit, though it will be a little tight. A small block has all kinds of room -- the AMC GEN-1 is sort of between the two in external size. The 64+ American won't take a big block, but will take any small block.