hi, i live in melbourne ,

Where abouts are you from canuk120?

thank you, that makes sense and gives me a direction to work with, much appreciated, although there are no bolts on the back of either wheel at all just the spline and a bolt which goes over the spline, so attachment will be a weld anyways? i'm not sure. the ring of metal for the 360 degree horn would seem to block any bolts of use and as there are no holes to even put a bolt of any kind i will need to look at a new boss to see what type of interface will suit. is it ridiculous to think a reducer or shim would be adequate enough to allow a safe interface?

The only boss kit that will definitely work will be a 120y competition or GX boss, they have 3 bolts that I am certain are the same as the 240k wheel. Unfortunately I am sure no-one would part with the boss off their wheel so getting one will require you to buy the whole thing.

SAAS/Autotechnica/other cheap wheel bosses have 6 bolts but 3 of them might line up, I can't say.

Search Ebay for a boss.

great!, is there a proper boss for this swap!, i would take that any day!, i'm looking to swap a 120y steering wheel for a 240k or 240z steering wheel with a larger spline, is there a boss that does not have the 6 bolt new wheel setup? it cant be this complicated, either a new spline (which i'm not sure will bolt up to the steering column... (question: does the splined part at the top of the steering column bolt to the column itself or is it all one piece?) and if it does will it be adaptable with the 120y column??) or a reducer which will allow these two to adapt to each other... its always a safety issue, just like every other adjustment i have made to this vehicle, but i'm talking 2 or 3 mm here, everything else is a perfect match.. so if a reducer or welding is possible i dont need to change out steering wheels every month...i just need to know a boss kit which will work with this spline to spline swap or a remedy for column attachment of a 120y column to a 240z spline end piece...whoff....

Your playing with fire here,if you where to have a failure you won't get a second chance,just a smashed car and maybee body or someone else.
Get the right boss and do it properly!

fair enough, i will keep my eyes peeled for a suitable solution, after a nights sleep i have had a thought; if i use a rotary type drill bit to core the new and old splines out of their respective wheels, and then weld it into the opposite wheel, would that not do the trick?, i'm sure there is a method to make that weld stick... is there a bit strong enough to core this metal?

Unfortunately, I don't think that saas make boss kits any more. Although, if you want to get the steering wheel closer to you you could use an ordinary boss kit to do the job. I am lucky as I have access to lots of different CNC lathes and machines so modifing the wheel is no probs for me. But I did have to weld the 3 spokes of the wheel together and weld fill all the holes before machining the centre out to fit the wheel to the boss. It sits perfect for my 120Y. Around the same distance as the origional big wheel. I don't have any pics of it yet as it is still not finished but when it is I will post some up. The wheel only gets worked on in spare time but work is bloody hectic at the mo so it is at a standstill unfortunately.

huh, ok i think i see what you mean, do you have a part number for that saas kit?, i'm missing the visual on what this item should look like, the only ones i have seen have the 6 bolt type which i think would not work at all, ant they would also seem to put my wheel much too close, i'm looking for the furthest possible distance due to my arm reach, but to get this wheel on i would realistically take anything, cheers

On that type of wheel, the spline boss is welded to the spokes of the wheel. So it is more or less an impossible fit without the modification of the steering coloumn or if you can aquire a new spline boss to weld up. Thats why I chose to use the saas boss kit and modify the wheel.