Firebird od suspention / stance change afther 1400 miles

[Roadrage David]

ok guys something weard here!!.
my left side of the car hase dropt halve a inch on the left side frond AND rear. everything and i mean everyting is brand spanking new. car hase only 1400 miles on it.
now im not a small bantam weight boy. im a heavy weight , but that cant posible have anything to do with it.

I was thingking that maybe the left side of the classic Koni shocks havend not been put and the same level of stifness??? could that be the case..... any other toughts are welkom.. car drives runns great nothing wrong with it..
ps frond Hodskish 2 inch drop coils rear 2 inch drop DSE leaf springs. DSE subframe conecters mini tubt. slide alink traktion bars. ecetera the wholle 9 yards...................