You wouldn't shoot yourself in the feet with foriegn ammo, would you?
I don't blame Ford US for not supporting there foriegn cousins. Quite often, they could be nasty lemons. But just how good would a Capri 2600 would have been with a Boss 302, or a Taunus/Cortina Six with a lighter 200 or 221 cube in-liner rather than than the cubless Cologne.
Mind you, asside from the lack of capacity, the little Cologne V6 in my Taunus -based TF Cortina was a real screamer... the 2.3 was just a bored out 2.0 liter. Major fun at 6600 rpm, still pulling with a Solex dual throat.
The Zephyr stuff had an optional Raymond Mays alloy head with twin or triple carb option. 168 hp from 2.55 liters in 1959. He went on to do the Lotus Cortina 1600 Twin Cam engine. Then the Alexanders did SU swaps on the Zephyr sixes too. Some of these engines ended up in the AC Ace, Acea, and were the forerunners to the AC Cobra. Raunchy sounding engines, those little sixes, with a reverburating zZZZZZzzz which sounded like an Aston Martin.
The MkIV that followed it was a major bummer...but with a 390 FE and some mags, it could be a cool cruiser!