[1985 CCX]

Nico,

I agree with Jim, tough budget to keep with for a build around frame and body alone. Lots of cash will be needed, been there a few times myself.
Motor (FE must) figure at least $15k, rest with trans est $5k
4 corners $20k
Interior $8-10k
Paint $10k
Do dads $10-15k (jewlery windshield lights etc) ................... $$$$ Already budget buster... $$$$
If you want period replica assume parts will take 24+ months to source as they are not all easily found. Then you can add 30-40k more....

Also, consider does the car have a KMS title? The KMS name carries weight but without it its a scratch build.
Not all alloy cars are KMS, forgive me as I am trying to help if you know this.
The Polish cars are making their way around EU and USA now aday's and also w/o title. They commonly email folks like us on the forum.
There are also UK cars manufactured (Brooklands) that are racing only so there is no title at all.
Just a consideration.