Tell me I'm a git if you wish, but in my head I'm thinking, " So you have a rare Mk2 Escort 4dr, and you effectively want to use it as a donor for a kit car, why?"
Sell the 4dr and use the money plus the expected budget for all the body shop work and the new shell, and all the incidentals to buy a good 2dr.
Or, buy a bucket to collect your anguished tears and wreck a good car to make a bitsa.