Alas, I was a college student replacing an SR Semi Pro that had been stolen and lacked the requisite funds to hang it with a Record Gruppo so I went with the Gran Sport. Bill Samoan, then owner of Bill's Bike Shop in Camarillo was pretty into the road racing scene and built the bike for me. Bill suggested the aluminum based Gran Sport Gruppo for my use as a more durable option compared to the more "exotic" magnesium blends used in the Record. I am not sure the titanium based Super Record stuff existed yet? Hmm....
In any case, it's all original except for a Record brake lever, replaced by a local bike shop, raided from one of the owner's vintage bikes, when they mysteriously lost mine during a service. Also fucked up my rear cluster. Replaced it w/a flat lander road racer/criterium rig that is worthless if you ever need to climb a hill and don't have telephone poles for legs. As I am sure you are aware, SD is great hill climbing country w/all those ravines and mesas and Bill had my rig set up appropriately. Oh yeah, I put enough miles on it way bitd to "sharpen the teeth" of the first set of chainrings so replaced those on Bill's advice so as to not stretch out my chains as quickly. Chainrings were replaced w/original Campy Gran Sport stuff.
Lesson being don't let anyone who's never touched anything other than Japanese stuff work on your vintage Italian rig even if they assure you they know what they're doing. If you don't see it hanging up on the wall... likely they don't. Speaking of which, I was once offered $3K when I took it in for service by Fairbanks, AK shop owner who had a nice vintage collection. Needed money at the time so was tempted. Now glad I did not. And lest I hijack the "Random Photo Thread"... Geronimo! Here's a pic:
So, yeah, it's a cool thing to have. I go stare at it and wax nostalgic fer' the good ol' days from time to time.
P.S.; As for the SR Semi Pro... I recovered it one day when I was shopping for a room to rent when, no shit, there it was, leaning up against a wall in the living room. I said; "Hey, that's my bike!" Guy showing me the room replied; "No it's not, it's my roommate's." After a bit of back and forth I was picking up their phone to call the cops and recited the serial number, which I'd memorized because it was my then ATM card's pin (yeah, they used to be much longer than four chars). He figured out I was not joking and dead serious so checked the bottom bracket and asked for a repeat. Lo and behold I was spot on! Still recall thirty plus years later: MOJ60288, or damn close. Whereupon the dude got a pretty worried look on his face and told me to "just take it". Needless to say... they didn't offer me the room. Turns out the room mate was a classmate "friend" at UCSD. I loathe thieves and damn tempted to reveal his name here but we all make mistakes so hopefully he's become a better person since those days. Thief had turned it into a "beach/boardwalk" cruiser and it was pretty thrashed. I had my Colnago by then so gave it to my bro, who got Bill's to fix 'er up. Still rides it to this day!