clutch pedal interchangeability

looking at the pics for the 63-66 pedals vs. the 67 up. I just went thru the same thing. I ordered a rebuilt from SMS and received what looks like the 63-66. It would not fit as the pedals were to far apart (may be way pic was taken ?) to work with steering column in my 69 GTS, notice the pedals in the 67 up are close together up top. they reshipped and sent me one that was like what I had, except for the way the return spring was mounted (spring was not covered). My shop manual indicates the V8 assembly is as pictured for the 67 up, it has a heavier return spring with cover and heavier pedal pivot pin (don't know actual terminology)than the one I received which is also shown in shop manual for what I take is a 6 cyl. QUESTION I HAVE WILL IT WORK, everything else appears to be the same, thanks for any advise.