No, the floor pans are completely different. The MK3.5 will fit the MK4.
easy two plastic screws under seat
H4
no i dont think it will they are totally different shape
13.5 cm
just about everything
take the clocks out of the dash where the speedometer is their is a load of wires coming out of that lpug it out and the green wire should be in number 10 connect to that
No they do not. The Mk3 uses an entirely different headlamp as compared to the Mk4. They will only fit if you swap the front end of your Mk3 with a Mk3.5 Cabriolet. Furthermore, Hella Makes Headlamp units that look very similar to the mk4 headlamps.
My Mk3 fiesta did not.
No they fit different, although mk2 and mk3 and some mk4 polo gearboxes will fit. You want an 8P gearbox.
If you problem is with a Mk3 fiesta you will probably find its the controlling relay for heated window as over time this gets hot and melts? it just a case of renewing it. It is located behind fuse box inside car.
The rear speakers in the mk3 are 5 1/4 inch. If looking to install different speakers, an adaptor may be necessary.
http://www.fiestaguides.co.uk/content/interior.html