I'm also trying to figure this out for my 68 but here's the info I have;
I think these are all Front, don't have any info where it has 67 listed for rear.
3192419 is listed as 67 Base/F41/L35/L48/L78/Z28 broadcast LG
3192420 is 67 Base/L48 broadcast LH and also Z28 broadcast PT
3192477 is 67-69 Base/F41/L35/L48/L78/Z28 broadcast PS but also PW for 69 only
I know, didn't answer your question, best I could do. You should also see my post for spiral shocks.