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Old 04-30-2012, 09:08:48 AM   #1
allen1073
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Why do this?

I bought my 72 6 months ago and after swapping engines and getting it painted I finally brought it home. I bought 17 x 9 torque thrust 2's 5.5" bs for the rear and anticipated no rubbing issues. I drove the car home from the paintshop(only 4 blocks) and heard something rubbing. To my dismay it was the shock stud eating the inner wheel lip. The car had 2"lowering blocks on it. Not uncommon, but why the hell would there also be adjustable shackles in the back? Why try to drop and raise the car at the same time? I pulled the blocks and relocated the spring to the hole nearest the frame until I get stock replacement shackles in.

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Old 04-30-2012, 09:51:20 AM   #2
allen1073
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Pic from backside.

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Old 04-30-2012, 10:29:44 AM   #3
POS71RS
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Probably because the blocks lowered the car too much.
I have Hotchkis drop leafs on mine and I felt the rear was a scoshe too low as well. So I have some slightly taller shackles too....but you can't see them protrude past the tailpan...that drives me nuts.
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Old 04-30-2012, 11:01:12 AM   #4
allen1073
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I'm not sure what the final result was, he may have ended up back at square one(stock height or maybe 1" or less drop). The car is sitting around 30" now to the fender lip. The front is around 26". Didn't check it before I removed the blocks. Looks a little higher now but hopefully the stock shackles will get me back to around where it was at. I prefer a little rake. There is a 2" difference in tires also.
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Old 04-30-2012, 11:09:08 AM   #5
POS71RS
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You have to install some pretty lengthy shackles to get a lot of lift. I'd say it's about 50%, probably a little less since the axle is forward of the leaf spring centerline. So, if you install 1" longer shackles, you'll lift the rear about .5"... maybe a little less. So, if the P.O. put in 2" blocks on the axle, and 2" longer shackles, he'd essentially have about 1" in total drop.
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Old 04-30-2012, 11:55:55 AM   #6
allen1073
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Quote:
Originally Posted by POS71RS
You have to install some pretty lengthy shackles to get a lot of lift. I'd say it's about 50%, probably a little less since the axle is forward of the leaf spring centerline. So, if you install 1" longer shackles, you'll lift the rear about .5"... maybe a little less. So, if the P.O. put in 2" blocks on the axle, and 2" longer shackles, he'd essentially have about 1" in total drop.


If I remember correctly I measured somewhere @5.5" to 5.75" bolt centers where it is now. He had it on the one below which would make it @ 6.5". I may have to go back with a 1"block after I get the new shackles in. I agree with you on the long shackles sticking out the back, can't stand it.
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