lowering my car

[wrenbirdx2]

so i bought my car from a junk yard took it though inspection it only had3 problems front and rear driver side springs are broke head lights need adjusted and a marker light lense was busted next week im going to buy some new spings and shocks for her the guy at the shop said he sold to diffrent hights first is a 60mm front 35mm back or a 60mm front 50mm rear
so should i get the 35 or the 50 and what are some problem that my pop up from lowering it i was just going to put some oem's on it but the ones ive found at the junk yards arnt worth the trouble plus i think they look tight lowered

[Starmavin]

Go to advance auto parts, they actually sell the Eibach suspension PRO-KIT lowering coil springs for the E30. It lowers the front 1.6" and the rear 1.4" for less than 300 bucks for all 4 corners.