ab1;c-152026 wrotethe 164 seat rails are slightly different width. it would be the easy option to mount the alfa seats to the 164 rails (which i may have to do) but the problem with the 1 series is the cross member means that the seat sits far too high. my main reason for wanting to modify the cross member is to sit lower and feel less boaty but obviously i do not want to do that unless it is safe to do so. i find it strange the 240 shares the much of the same platform but it does not have this cross member at all.
i wont be doing any such fab work unless it maintains structural integrity of the vehicle.
Do you actually sit higher in the 164 than a 240? I have a 145 and I actually feel like I sit a bit lower in that, even with the seat up as high as it goes. If you look at the crossmember on the 140/160 does the top of it sit higher than the integral crossmember in the 240? I’m not sure. On the 240 the height of the crossmember is just below the top of the sill panel. I didn’t think the 140 crossmember sat any higher than the sill, so you may just be thinking the crossmember is higher because it sits there by itself, not gently sloping metal like is in the 240. I could be wrong, but I’m happy to take some measurements on both 140 and 240 to confirm what I’m thinking if you like. See my crude sketch below going by memory...