Hi Donkey, welcome to the forum
Yes - lots of experience if it's the 907 slant 4, but with the turbo version from the old (S3) Esprit rather than the Eclat.
My personal advice would be that unless it's in perfect working order then don't bother as the parts will cost you a fortune (as I know to my cost - £200+ per cylinder for pistons and liners 15 years ago) , and it doesn't produce that much power in normally aspirated form.
If you do decide to go ahead then I have a set of Esprit manuals I can pull information from when you need it.
It would look good under the bonnet though
Matt