I found this a piece of piss to do took engine out sorted mount and fitted rs2000 lump in an mk2 orion mk1 orion and mk4 escort, you can either use your original gearbox or use rs2000 one which is 10/20mm longer if iirc so is tight and you have to trim inner wing, you use the cvh engine mount to fit it but have to adapt it b cutting a bit off of it.
Wiring is a pain in the arse I did 2 different ways;
1st way was to use rs2000 engine loom with pats and wire into standard mk4 loom
2nd way was to use rs2000 removing the pats by using an early rs2000 ecu if you can find one they are rare or have your ecu fucked about with this way was a pain in the arse so on the following engine conversions I reverted back to my 1st way however I did have this car running this way but it was hard work and long winded