Hey guys I just wanted to ask whether one can fix an original Floyd rose os similar tremolo on a Gibson SG (I maskin this coz ive never seen a SG with a FR)??

Theres little stopping you putting a floyd rose on any guitar aside from the routing required.
Gibson 58 RI VOS Custombuckers
Mesa Lonestar Special 2x12
I do not have a source to quote right now, but I remember reading that the body of Gibson's original SG-design is to thin to support a recessed routed Floyd Rose-system. Both guitars on the pics above have non-recessed Floyds.
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How you know you have too many guitars...

Apparently once also known as PonyFan #834553.