Okay, I'm trying to get all my parts together (still, but finally) to rebuild my front end, and am trying to decide whether or not I need to get offset cross shafts for my upper control arms. I'll probably get them anyway for the extra adjust ability, but would like to know from the get go whether or not my frame has sagged. There isn't a whole lot on this subject from searching. My Chevelle is a 71 2dr coupe, from exactly where do I measure on the frame, and what is the factory spec?

Thanks,
Jake

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http://img301.imageshack.us/img301/4076/framedimsdr5.th.jpg (http://img301.imageshack.us/my.php?image=framedimsdr5.jpg)

Thank you very much, Brad. Looks like N. is what I'm looking for 31 11/16".

I can't really measure this till I get a couple plumb bobs rounded up to get an accurate measurement. But, interestingly enough, here's a couple pictures of how the shims are arranged up currently if this indicates any signs of possible sag. Just seems odd how the right side has that tall stack of shims on the rear bolt and then nothing on the front bolt.

http://project71.net/skeeveman/suspension/Control_Arms/Before/

I can't really measure this till I get a couple plumb bobs rounded up to get an accurate measurement. But, interestingly enough, here's a couple pictures of how the shims are arranged up currently if this indicates any signs of possible sag. Just seems odd how the right side has that tall stack of shims on the rear bolt and then nothing on the front bolt.

http://project71.net/skeeveman/suspension/Control_Arms/Before/

My 70' has quite a few shims, used evenly, on both driver side bolts. While on the, right, ..none were used on the rear bolt, but 1/4" worth of shims for the front. I have no idea what was "normal" from the factory. I see your bolts are installed backwards, with the head facing towards engine. Done for more header clearance?