Not having to find and pay for a 73+ K, LCA’s and sway bar? Or having to remove your original stuff and swap it out?
Exactly.
Even here in California the 73+ A bodies in regular wrecking yards have pretty much completely dried up. If you pull spindles and brakes off an FMJ car you don’t get a K member or control arms so you end up keeping your early sway bar. And that means calipers to the rear. But even the FMJ cars don’t hit the yards very often anymore. On top of that, the calipers usually cost as much or more at the yard than what you get for a core charge on new calipers, so, why mess with nasty wrecking yard calipers at all?
Plus it’s just more work to swap everything. Yeah, the spool mount K’s have better engine mounts, but that’s a lot of work for no real significant gain. The sway bar is the better improvement, the ‘73+ style improves clearance by running through the K, and you can run wider tires without interference. But for a lot of folks there’s no real reason to swap that stuff.
I just don’t see what the beef is. Cass went through the trouble to figure out which calipers and hoses fit each configuration best, and somehow that’s a problem?