Actually, I would like to see an old Lotus (Ford) Cortina MkI with a turbo four out of an older Esprit in it. The utlimate Lotus Cortina indeed. I would gladly settle for a TT V-8 out of the newer Esprit, but I doubt it would fit.
B.T.W., the 4.6L supercharged V-8 in a Focus has been done. A Focus RS with a DOHC 5.0L Ford crate motor in it will be at NAIAS on the fourth of January (this Sunday)
Their is a rwd conversion kit for sale that both of these cars use by (I believe) Kugel components. Apparently the conversion is fairly straightforward and a bolt-in affair.