I have an Aceca - RHD, really nice car. My car is setup for classic rally's and is quite good. My car use to have a Ac engine, but the second owner replaced. I have now installed a zephyr engine, might at some point change back. The zephyr I have is for road/race, it is quite powerful at around 145-160BHP, running reece fish carbs from ex-works consul.
If you are not use to Aceca's then just a word of warning, check the wood around the doors, etc. If the doors "kickout" too much at the bottom, this may be a sign that the wood is rotten. Also I have fitted a rollbar for racing, but it looks OK.
I hope this helps.
John.