Spyder make sure the new engine (with its higher power output) stays cool and uses a specially built radiator with an extra core for higher efficiency. The inlet pipes are designed to emerge as close to the corresponding engine pipes as possible to minimise the length of the flexible hosing, which adds to the car's in-built reliability.

To further ensure reliability, Spyder recommend using silicone water hoses around the engine instead of rubber. You'll pay more, but they're stronger, withstand higher temperatures and won't degrade with age (unlike rubber ones). Silicone hoses are also easier to fit, sliding over metal pipe stubs. Spyder supply the appropriate hoses for the Zetec conversion.

Many engine conversions end up with hoses dangling all over the engine bay, and the heater usually causes the most problems (especially when the hoses split). Because of this, Spyder produce metal heater rails to minimise the length of flexible hose needed. This one comes off the back of the thermostat housing - and you can see how short the hose is.

The aftermarket fuel injection runs at a higher fuel pressure than any carburettor would need, so a Bosch aftermarket pump is fitted in the boot. Carburettors rely on the fuel in their fuel bowls to cope with short term fuel starvation (cornering on a near-empty tank). Injection systems either need baffles in the fuel tank or a swirl pot - Spyder opt for the latter.

Before the fitting up goes too far, the wiring loom needs to go in. The old loom had to go for reliability and safety, but, rather than have one custom made, or try to adapt a replacement Elan loom, Spyder use a universal kit car loom from Premier Wiring. It comes with all the wires needed, plus extras for accessories such as stereo and electric windows.

The replacement loom comes in three parts, front, main and rear, with the main loom designed to sit behind the dashboard. A modern fuse box is incorporated into the main loom - Spyder cut a hole in the back of the glove box for access and bolt the fuse box to the glove box. All earths (except main battery earth) run back to the earthing point behind the dash.