I have a VWT25 and want to fit a swivel to the passanger seat. the problem is the seats have been replaced by unknown car seats, (possibly Volvo 240?).

The new volvo seat runners have been bolted onto the original runners by a previous owner.

Can I use a T25 swivel, remove both sets of runners and bolt the orignal runners onto the swivel?

Can I bolt the volvo runners onto the swivel?

Yours, Andrew.