As far as Im aware the bits you want off a 420 are:
Cambelt side engine mount
Gearbox side engine mount
Bottom (sump mounted) steady bar
Gear linkage
Coolant pipes
PAS system/pipes
Driveshafts
Throttle cable
Clutch slave cylinder & bracket

Although im not 100% sure someone who has done one would be able to tell you for sure, both Dan (carmadbaker) and Pete T16 have got the 2lt turbos installed so would be able to say for definate

You don't need the subframe off the 620.

You won't have a front subframe on the zs, because the front suspension is different, and doesn't need a front subframe.

You'll need the cambelt, and gearbox engine mount from a post 96 bubble 420, and possibly the gear linkage as well, if your 1.6 is a PG1 gearbox the existing linkage should fit.

I can't help much with the electrical bit of the conversion cos Ade at AA autosport worked all that out.

Ah nice one Jay, things like coolant pipes that you need will depend which way you decide to go with radiators, and i/c

I've just re-read some of your earlier posts where you say you have a Tomcat turbo engine, does it have a tin, or alloy sump, because you need the alloy sump to fit the lower engine steady.

I looked in to it when I had my 120 but never went ahead so I dont know the full details. Although as I understand it you pretty much need everything bar the engine and box off the 420 for the ZS

also can u chop the plug connector off an wire it 2 the 620 1

an if yh do u know wot wire goes were????????

Which plug connector?

the one on the ecu.....

t16
 

get your self an early 220 /420 engine loom / ecu and then as me an a mate did this conversion to his 1.6 zs mk2 last year it was just a case of taping into 6 wires on the zs loom to get it to get it all to work just cant remember which 6 and he has now sold it or i could have check for you are you using a 620 lump cos if so dont run it above 12psi of boost or the engine will blow the early 220 /420 lumps have stronger pistons and can take 18psi if you get the fueling right

Not on MEMS it wont.

ime Mahles are just as fragile as the later AE pistons