Fitting:
Just two under the dashtop for a GT as here: (mgb-gt.co.uk)
Note the two large lozenge plate-washers AFH2627 each side on both roadster and GT, with a standard washer on the forward bolt of the roadster. The roadster plate-washers are closer to the door opening than on the GT, the GT items are where the two roadster forward bolt holes are. There is no third bolt under the dashtop on a GT, instead there is this clamp plate AHH8094 where the wing attaches to the A-post (this is the offside): (mgb-gt.co.uk)
The plate washers are either side of a kink in the body panel and this matches up with the dog-leg seam in the scuttle at the base of the screen and the top of the wing. Both roadster and GT have this but on the roadster it is further back and concealed by the screen seal on a roadster, in front of the screen on a GT. The wing must be pushed back as far as it will go to close up any gaps beside the seam. There was something preventing that on this roadster, found like this as shown by the screen seal witness marks: (MG Experience)
Four more (roadster and GT) in a vertical line by the A-post: (mgb-gt.co.uk)
Three spire clips along the bottom edge of the sill for the wing lower-edge screws with small lozenge plate-washers AFH2546, although there is an opinion that these should be between the wing and the sill for drainage and ventilation as well as getting rust protection such as Dinitrol in the gap: (John Keene)
Personally I feel the lozenges should be on the outside as shown for the same reason they are on the upper bolts - to spread the force and reduce buckling of the wing panel. If washers are required between wing and sill then plain washers would suffice ... and being smaller would leave more space for drainage!
Two behind the grille with penny washers (albeit the top ones missing both side of Bee - 'not guilty M'Lud' ...):
Three bolts to the front apron under the bumper, although the apron would probably be off anyway if removing the wings:
And finally a line of nine along the channel beside the bonnet, you will need to remove the bonnet buffer(s) as the self-tappers go through both outer wing and inner wing flanges:
Fitting kit contents vary - some only standard nuts, washers and bolts not the specials as above.
The offside wing is a still a bit forwards of the bonnet and the grille, but at least the grille is recessed by the same amount top to bottom both sides. Before this the lower part of the grille on the offside was recessed by a good inch:
Another issue pre-paint was that I couldn't get the crease in the door skin (under which the bright trim strip fits) to line up with both the front and rear wings without cocking the door in the opening, which looked awful. The wing crease was too high, so I slackened the three bolts in the vertical line by the A-post, and with the car under the carport put a length of timber on top of the wing above those bolts. Put a jack under the castle rail under those bolts ... and jacked the car up. This pushed the wing down relative to the rest of the car, and when in line I tightened the three bolts, and there it has stayed.
The top of the main splash panel HZA 4304 RH HZA 4305 LH with three bolts:
The top two going into sections HZA302 RH HZA303 LH which extend the footwell flange upwards between the 'trumpet' section and rear box-section: (HJR Garage)
The bottom of the main splash panel with three bolts visible, the 4th bolt is out of sight where the very bottom of the panel turns under the sill:
Complete flange, sill etc. yet to be fitted: (HJR Garage)
A seal runs round the curved edge of the main panel and over the top plates. Originally AHH6421 RH and AHH6422 LH riveted to the splash panels at £16 each, there is a better alternative BHH626 which fits either side at £3.