[Cb]

i have acquired a very well partially built mk kit car.
The kit is built with all parts direct from mk except for the engine/gearbox and rear drum brakes and what looks like the steering column. I have looked round the car and can find all major parts on their website. Unfortunately there is no receipts for the kit or parts as they have been lost. the previous owner has been building for 5years in his garage but gave up
It has a 2L pinto engine in it with a shortened sump and twin webbers. But there is no water system yet and the loom still needs finishing for the dash and lights.
My question as I would like to make it road legal, should I buy a 2l ford focus and swap engine and anything else I can to enable me to use the reg from the donor or should I keep going with the pinto.
Any help appreciated