I disagree on the mustang shocks being all the same!
I originally bought from Lordco, but on a whim checked the next door neighbour parts place and they crossed the shocks to two different Gabriel shocks: one was the same price because it was for a performance handling package and the other was $30 less because it was for the regular handling package. I, of course, saved myself $30 and some extra valving that I don't want anyway.
The number I had was from a posting on this site. Oh, and I measured them all ... they were all pretty much the same dimensions on the counter (But I have long since chucked the bit of paper I wrote it all down on.)
Cheers,
Aaron