The main differences are the whole front and rear suspension geometry has been revised.
If your missing a little bit of front end it will be just the ticket. Upgrade kit is LAW35.
If you missing a lot of front end I suspect the KMC conversion's weight distribution isn't suiting you, this is the problem I have with the BJ4WE stylee layouts and why I know run a ZX5-SP not a "4" car.
With the ZX5-SP on carpet, perm' 4wd you might find the following a good starting point
Kit set-up except
Front,
longest link, 2mm under inside ball stud
just a fraction of tow out (about .5 degree total so .025 per side)
7 deg castor blocks
knuckle mounted in low position (place 2mm trapped washer between lower pivot rather than between upper pivots)
Yellow springs 35wt oil
Rear,
Longest link, no washers under inside .... 2mm under outside
2.5deg rear toe in (A25 block)
3 spacer under front pivot block (1 or 2 spacer if there is lots of polished floor though)
Silver springs
30wt oil
Med wheelbase
Cells forward.
If car feels a bit twitchy then up 5wt all round.
I have not run an original ZX5 on carpet so can not help ..... but once you've driven the SP version you won't look back!!!
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