Entertaining using 73+ front brakes, but want to retain center caps from original sbp 14" rims.

Will they fit lbp 14"s?

Yes! I have done this for many vehicles. I even run a set of 1960 Valiant caps on my 84 D150 with 15" rims. Of course it is always a good idea to check the rims first, but stock 14" steel rims should not be a prob.

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. . . there was good sport at his making.

14" to 14" is no problem, it's when you upgrade from a set of 13" rims to the 14/15" guys...

The only exception to the "rule" is Rallyes or through bolt centercaps, where you would have to get a set of SBP Cone centers, or LBP "Acorns" depending on the rallye.

-D.Idiot

I have ran the13" dog dish caps on 14/15" rims without any problem.

thanks