i've had a search as i know we have covered this subject but to no avail
so i'mn looking on what anyone has fitted within the door not a bolt on as i've done before but a manufacturers unit that will fit the 7's guides
[8 whole cylinders worth of punch to ram the world through the windshield and out the rear view mirror. Car & Driver]
1981 Grinnall TR7 v8
1981 Black FHC
1979 & 1980 Black Premium FHC(laid to rest) Sorry
John