> The torsion bars are not intchangeable and may be the cause of some
> peoples front end problems if someone has installed the incorrect ones.
> They are clearly
marked.Right 702524 and left 702525
This made me think of an observation I made back when I was restoring a lot
of Corvettes. It isn't 100% infallable, but is pretty close: GM used even
numbers for right-side components and odd numbers for left where there are a
left and right pair, such as headlamp bezels, axles, exhaust manifolds,
whatever. For instance, if you've got a pair of parking lamp lenses in your
hands and forgot which one goes on which side, you can be _almost_ certain
by the odd-even trick. Helps sometimes when you're putting things back
together. I'm not sure I've ever seen an exception, but I kinda think I
have.
The only other part-number trick I remember is that on a Rochester (GM)
carburetor from this era, the fourth-from-last digit in the part number is
the year model ie 7040204 is from a '70 model; 7041204 is basically the same
carburetor but '71 model. Starting in '76 if I remember correctly they put a
leading "1" as in 17046204, but the year model is in the same place. 7040204
is a valid number for a quadrajet for a 70 396 or 454 in a Chevelle, FWIW.
Hope this helps someone someday; hate to take all this hard-won triviata to
the grave without someone benefitting!
Travis
