Does anybody know which makes have the same stud pattern as
the 260c?
cheers

hey bro, ok now to be 100% honest i dont even know the pattern or even how many studs but as no one else has answered ill offer up a couple of generalisations. ok if its the std nissan 4 stud pattern, then mitsubishi 4 stud rims also fit, be carefull though as to not get fwd offsets if it is the 5 stud pattern same as a 300ZX the mitsubishi GTO, 3000GT and also Diamante 4wd rims also are interchangeable, pretty much all nissan/datsun stuff is interchangeable with the exception of obvious differences such as 4 and 5 stud and your different offsets.
good luck man. choice from chris.

The later model 4 stud nissans have a smaller PCD (Pitch Circle Diameter)

eg. a SSS Pulsar (Almera) wheels will not fit on a 1200/180B/200B etc.

I agree that the older Mitsubishi wheels fit on older Datsuns.

Regards,
Chris

dvsrx, I believe your 260C would be 4x114.3 so try the following (all in 4 stud of course):
Nissan/Datsun - All except Pulsars. Latest Pulsar shape is 4x114.3 but all earlier models are 4x100.
Toyota - All except FWD Corollas which are 4x100
Mitsubishi - All
Mazda - Late model 323,626 & 929. Early models are 4x110. Try after about 82-83 but not sure of year. MX5 is 4x100
Ford - Most Lasers except the TX3 body shape I think its 4x100
Offset is also a factor but some RWDs can take FWD rims depending on tyre size. I just measure to edge of tyre (assuming it has size you want) from mounting face of hub. Put a stringline on the back of the tyre or rimand compare the distance with your stock tyre and the space available to your suspension or what it may hit. If you have the offset no. it helps but gets confusing if you are not comparing the same rim width.
I am fitting 16x7 FWD rims to a Morris Minor which comes with 14x4's.