It isn't an 88 but it has a Series III VIN! The MOT isn't relevant to whether the mods were declared or not, just that it passed the MOT. You need to get all the details straight with the DVLA (weight, engine size, VIN, etc.) first, which may need the current version of the SVA inspection (a hybrid adult will be along shortly)
The strips you found are the lockers for the power steering. another giveaway it isn't an 88. look a bit further forward of these, nearer the bumper.
IMHO you have bought a right little pot of problems!
Errol