Please don't rip me a new one, but....

So I have this 408cui/425hp engine I built earlier this spring in hopes of finding anything rear wheel drive Mopar to stick it in. Problem is anything Mopar is stupid crazy expensive, even if it is door handle deep in dirt!

I have a chance to buy a super clean, low mile 81 Lincoln Mark 6 from the original owner. I've done research till my eyes bled and couldn't find a single person that has transplanted a small block Mopar in a Ford/Lincoln product.

Can anyone here tell me if it has been done and if so, what I will need for fabrication and parts?
Thank You, Ashton Blackwell