Sorry for the misinfo on the bellhousings. 72 and up AMC 6 and 8's share the same bolt pattern. and that is when Torqueflites started being used. wishful thinking they were the same.
not enough lowering but the SuperStock A-bodies had spacers between the k-frame and frame rail. I "think" the lower ball joints were bent to realign the linkage but still not enough for what you need. think spacers were 1/2' or so.
take a break, leave the garage door closed, put your feet up and enjoy your favorite beverage and snack with a close friend or the breeze in your face.
In my younger days this would have been 1 full day work (maybe 2 if I was slow). I am allowing for 5... :-(
I can do all that in one day, that is, removing the items. reinstalling them? 7+ years and counting...
I guess if you put the heaviest spring in the secondaries, they may never open or maybe just a tiny bit. but, otherwise, I like it! who did the intake?
https://store.yellaterra.com.au/1-65-ratio-modular-shaft-chrysler-slant-6-ratio-platinum-roller-rockers-yt-6711/
ran across these looking for something else, looks interesting. also list them for LA engines and others
there was an article years ago with a high compression Pontiac V8 that was built to work with all the emissions parts. I think they used the EGR valve but not sure to what end.