this is how I had my bmc (which went onto the quiet achievers car ;) )it on my old na, had the cold air feed routed to the front. may have a better picture somewhere but heres the only one i can find right now
found this picture; my standard n/a seat belt worked with these seat belt clips, unsure if glanza ones would fit, id imagine so... I may have these seat belt holsters buried somewhere... Ill have a look for them after work tomorrow
Well I did manage to get the MK1 seat belts to attach but had to screw them to the point where the rail connects to the chassis lol.. but they passed an MOT with them like that..
I noticed that the MK1 GT seats didnt have the screw/space for the seat belt bottom holsters (which attach to the seat) the MK1s mounted seat belts differently as far as I remember.