I haved installed Eibachs,BBK & Steeda lowering springs and didn't need a spring compressor,but their drop rate is 1.25-1.50".The Motorsport B springs have a drop rate of 7/8-1/2",so they don't sit as low as most spring kits do.One good thing about the B springs is they have the same spring rate(425/530 front & 200/300 rear)as the OEM spring on the 85-93 GT's.The ride comfort should be OK.I do remember a thread on here that talked about mounting stock height springs without a compressor.Well actually,they did use a compressor but it wasn't left on the spring during install.The guy basically put a( outside the coil mounted)spring compressor on it,compressed it til it was at the spot he wanted,ran a (extra large)ratchet strap around one of the upper most coils,ran the other part of the strap around the 2nd to lowest coil,ratcheted the strap down tightly,removed the compressor,installed the spring,jacked the control arm up,attached the strut to the spindle,lowered the jack then cut the straps off.I don't know why he had to cut the straps off though.You could also install the spring into the control arm,put the hook over the 2nd to last coil(at the top of the spring)then go around the bottom of the control arm & back up to the 2nd last coil on this side of the spring & attach the other hook to this coil then start ratcheting it down until the spring is compressed enough.This will also keep the spring connected to the control arm.I also know of a couple guys that installed the springs with a completely unbolted control arm.They put a jack under the control arm(in between the two bushings)& under the control arm near the ball joint area,put the spring in place,begin jacking the control arm up with both jacks so you can keep the control arm somewhat level.Youll wanna raise the jack (closest to you)just slightly higher than the rear jack since the top of the spring needs to lean inwards(towards the engine)somewhat to match the upper spring perch angle.The control arm bolts are gonna be a little tedious since youll have to get the control arm bushing & kmember hole aligned before you can slide the bolts through.
If you use a different method than this,make sure youve got the car far enough off the ground so the control arm can drop completely down.You want it to pivot as far down as it can,to allow as much space as possible between the lower spring perch(in the control arm)& upper spring seat(on the strut tower.
You should be able to get them in without a compressor,but if not I would try the strap method.The spring is not gonna need as much compression (as a stock height spring )since its a little shorter than the OEM spring.I rubbed a little bit of grease on the spring pocket to help the spring slide into place easier.
FB is right about putting the coil between the two drain holes.The pigtail(very end of the bottom coil)lands between those two holes.
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