Hi I'm on with build lwb fibre fab rat help / ideas for rear seat belts would it be ok
To use shocker top mounts gear box / engine bolts and the hole in middle of gearbox thanks I'm building it on a 69 swing axle does it need mot or is it exempt

What seat belts are you using?  The shock and engine mount bolts will be to low and to far back.
1969 needs an mot.

I have 3/4 harness belts

Rear seat belts are not compulsory for a 69. As for fitting harness belts they have to be secured at shoulder height. If secured below as you suggested, in the event of a crash the wearer will suffer spinal compression injury.

You can run a mounting bar shock mtg to shockmtg under the tub for the lap part of the belts to fix to but for the top mounts a flat hoop around the rear tub from the roll bar is the best idea doon001, paddy and a few others have them a trawl thro ugh members buggies or the meetings photos will show them.