Evidently the thread I listed did not make it in the migration to the new board.
Found the part numbers for the Mustangs again. Based this off of a 93 Ford Mustang 5.0
Automatic Trans - E6SZ-9A758-A Manual Trans - E6ZZ-9A758-A
Why is there a different part number for the manual vs. automatic cable? They should be the same part, at least on the throttle body end. The two cables should also be the same length. Is the attachment at the throttle pedal in the car different between the two?
I'm glad it's handling better. I get the softer springs though. I have 98 Mustang GT convertible springs all around. They aren't the firmest things and there is still some body roll but it's much better than stock. The stiff bushings front and rear help though. I assume like me you didn't want to go nuts with a non-dedicated track toy. If you've got to street drive the car the softer springs are going to ride much better over crappy roads. When I was younger I wanted the springs and all suspension components as stiff as possible. Now that I'm in my 30's compliant and firm is great, as it doesn't beat my kidneys to death.
Subframes are going to make a huge difference. I bet the car handles even better with them.
Does the cable open the throttle all the way? Some of the aftermarket cables are too short and won't open the throttle all the way. Double check that first.
If you want a more responsive throttle you can put a small nylon spacer between the ferrule on the end of the throttle cable and the piece that clips into the throttle pedal. That will take up any slack.
BMR makes some good springs. Should hopefully give you a decent combo of ride and handling.
If it makes you feel any better I have the same MM rear lower arms and my car still has the quad shocks installed. The brackets are on the car and the quad shocks don't rub the tires so I just left them in place.
I'm interested to hear how the MM panhard bar works out for you. Mostly how much of an improvement you feel in day to day and spirited street driving. I haven't picked one up due to some house repairs and travel eating up my car fund money. Hopefully next year.