Originally Posted by Blixa_Bargeld
1. I've got approximately (I could only find a flimsy plastic protractor) a 3 and quarter inch rise back to front on the rear LCAs. I assume that's pretty extreme.
2. Are there some reference points I can use to determine if the K-member is in the correct, if not optimal, fore-aft position?
1. Umm, yeah. Your springs are seriously messed up. If this is a 4 to 8 conversion, maybe the 4 cylinder springs are still in there and being compressed more by the weight of the V-8. And, it sounds way too high in the back - some drag racer's wet dream, maybe.
If this is a street machine, the Bullitt spring/shock combo should put you at a good ride height with a decent ride/handling compromise. If it's going to see some track/autocross use, maybe the H&R Super Race springs and some Bilsteins. More money, better handling firmer ride.
2. Read the panhard bar or torque arm instructions on the Maximum Motorsports web site. They include detailed instructions on squaring your chassis. You may be able to push the k-member a bit forward and remain square. Either MM or Griggs has some good info on measuring ride height on their website.
On the other hand, some camber/caster plates are more equal that others. I.e, some have a greater range of adjustability (and, some are much better engineered). So, once you have proper springs
(if you do it yourself, search re putting the pigtail on the spring in the right place. This will affect ride height.), see what you can get. Some C/C plates give minimal caster if you max out on camber. If that is the case, get some MM plates and try again.
With crappy Mac plates, I can get -3.2 camber and +5.0 caster. That's with the offset front lca bushings and it's an SN95 - not sure if Foxes give less.
Worst case scenario, you can get some flat plates to shim up the short springs and cut the too tall ones down a bit. Not likely to give you good or even predictable ride/handling.