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Gunny · 02-26-2016

Russ,

I lowered a '94 LT1 that I owned several years ago ... lowered the front by shaving the spacers off the spring then replacing with shims and the back using the bolts. Front is several degrees more difficult than the front but seemed worthwhile to me at the time.

Get grade 8 bolts/nuts from a reliable source ... this is from memory but I think I got 2" longer bolts and it seems like the nut was either a nyloc or all metal locking nut. I decided to add one more safety feature ... I cross drilled the end of the bolt and added a cotter pin. Sometime afterward I discovered the nuts had worked a little loose and the cotter pin kept them from going all the way off, so I recommend you consider using the cotter pins (or similar). I think some C4 owners used double nuts, but I believe the cotter pins to be a better solution.

If you lower the rear very much you may want to lower the front ... pm or email me if you're interested in pursuing this as I think I have a spare set of shims that I was planning to use on my 90Z (have since decided that I don't want to lower her).

I've not done it, much less owned or even driven one, but have you considered coil overs? that seems like a good way to go (didn't say cheap, just a possibility, tho).

On a different note ... the track you frequent ... is it west of Dawsonville? name? link? thanks.

02-26-2016	#2
Gunny Join Date: May 2005 Location: Georgia Mountains Posts: 918	Re: Rear Lowering Bolts Russ, I lowered a '94 LT1 that I owned several years ago ... lowered the front by shaving the spacers off the spring then replacing with shims and the back using the bolts. Front is several degrees more difficult than the front but seemed worthwhile to me at the time. Get grade 8 bolts/nuts from a reliable source ... this is from memory but I think I got 2" longer bolts and it seems like the nut was either a nyloc or all metal locking nut. I decided to add one more safety feature ... I cross drilled the end of the bolt and added a cotter pin. Sometime afterward I discovered the nuts had worked a little loose and the cotter pin kept them from going all the way off, so I recommend you consider using the cotter pins (or similar). I think some C4 owners used double nuts, but I believe the cotter pins to be a better solution. If you lower the rear very much you may want to lower the front ... pm or email me if you're interested in pursuing this as I think I have a spare set of shims that I was planning to use on my 90Z (have since decided that I don't want to lower her). I've not done it, much less owned or even driven one, but have you considered coil overs? that seems like a good way to go (didn't say cheap, just a possibility, tho). On a different note ... the track you frequent ... is it west of Dawsonville? name? link? thanks.