Shell isnt quite standard mk3.
The battery tray is different.
Also they came in both revisions of the shell, the pre may 83 two bolt strut top shell with the funny camber and the post may 83 revision
Most cars I have seen/owned still had solid lifters and in standard trim or lightly modded they perform much better on the coils despite what has been said.
HPI it. I have looked at soooooo many over the last 12 months and i'd say on 70% HPI have revealed something the seller has been less inclined to