why car does not sit level what gives????

[aany001]

Man do I have problems....I will try to explain it as best as I can.On 69 camaro I assembled my shortened rear end with brakes, half inch spacers then wheels installed and slipped it under the car with a DSE mini tub kit as well as DSEs 3" dropped leafs.My rear wheels are 18x12 with 6.125 backspacing.When the car is on the ground the left side sits 3/4" higher than the right side.Next issue is the left tire side wall is 1/4" away from the quarter panel while the right side has almost an 1" from the quarter.Here comes the kicker...you would think just loosen up the adjustable leaf perches and walk the rear end over 1/2" and problem solved but as soon as I move the diff a tiny bit the left tires inside sidewall sits the leaf spring!!! I have as it sits now 1/4" between the left inside sidewall to the leaf spring and 1/2" on the right inside sidewall to leaf spring.Man am I stressed out.......please help!
Steve