Hiya. Parts needed are:
'75-78 bumper rails, one front and one back (longer '75 preferred).
'75-78 front uprights (between shock and rails).
'75-78 front grille and spoiler.
'74-75 front turn sigs with bases (optional, but '75 preferred). Optional also are Euro lenses.
Alternately, you can mount your OE sigs into the metal plates below the headlights.
'74-78 ribbed plastic plates, just below headlights.
'74-76 red rear turn sigs (optional)
'75-78 bumper ends ('75 are easiest).
Your existing bumpershock units.
New stainless hardware to mount front turn sigs.
You need to cut and modify the uprights, bumper ends, and bumpershocks.
You should fabricate upper grille mounts.
You need to deal with the body holes remaining after removal of the
'79-87 bumper surrounds, either with plugs or bodyworking them flush.
The latter is pretty time consuming...24 holes doesn't seem like alot,
but lots of awkward areas to blocksand flush.
I plugged the holes on BlackX, in order to preserve the OE paint,
but filled/flushed the holes on IceBlueX, since it was already a re-spray.
And most front spoilers need some bodywork!
Besides the two Xs I've converted,
have also supplied components ready to bolt-on for three more cars.
My inspiration for the conversion was a pic in Faza catalog,
so after unveiling BlackX on my webpage some years ago,
several more X-heads have done the same conversion.
Ripley even named them 'Mittelstead Bumpers'.
Here's the same old boring pic I've posted before to show one style of front conversion:
(Thx to Tony for the inspiration to boldly post same pic over and over...heh).
IceBlueX has the bumper cut short and mounted lower between the turn sigs...for a different style.