If it is in fact fitted with an EBU manifold and carb (3-bolt carb), then the engine as currently assembled is not original. It will be worthwhile to check the head numbers to make sure the later manifold will work.
After 52 years, there's no way to know what has been done. Even if you bought it from the original owner, he'd be well into his 60s now, maybe older, and memory is not all that reliable. One thing is certain, with that carb and manifold combo, it's not original.
You will need to get your linkage to the driver's side for the new carb but I don't expect that will be too difficult. I think the pedal rod comes up on the driver's side, anyway. On my 61 I have a rod going directly from the pedal to the carb. You just need to take care in the adjustment to ensure that it allows the throttle to open fully yet not go too far to avoid bending or breaking things on the carburetor.
Lawrenceville, GA