Their is a company who might be interested in using my car for a test fitment.I dont know all the details.So im reaching out for some help,what do I need to know as far as whats covered when the install is complete?So,if they install the kit and engine blows or tranny goes,what should I have in writingas far as

Engine blows-New engine

Tranny blows-New Tranny
Etc.....Etc

Im sure you guys know what I mean.
So any help would be appreciated or what other things should be covered.Please be free to give some input.
Thank you