i recently purchased a 84 grand prix and the previous owner has welded in a ford 9" rear end housing with brackets that connect to the stock rear suspension. i have a few friends that run the stock rear geometry with different springs and shocks. the car is in the process of being put on stands and all nice and leveled out so i can run some numbers and do some math and measurements to make sure the previous owners welded brackets and alignment is correct.... now, my question is if anybody on here has done the same thing( swapping a 9" ) in replacement for the stock rear end and if so how did YOU do it. replace with adjustable uppers? adjustable coil overs? shocks... etc etc..... pictures and knowledge is appreciated. im leaning more towards a straight line 1/4 mile or 1/8 mile car and a very rare trip to go get a ice cream cone if you know what i mean. thanks