This is 123's drop in replacement for a Lucas 25D Or 45D distributor. Toss this into your MG, Triumph, Austin, Morris and have programmable digital ignition. This is the USB programmable unit, not the Bluetooth version (the Bluetooth version is Amazing BTW). These are awesome for tuning around big cams or better yet superchargers.
I have also adapted these distributors to many other motors, so if you are creative the 4 cylinder world could be your oyster.
Was installed in my mini for about 50 miles before I went EFI and distributorless.
Read all about it here
Asking $200 to a friendly GRMer. For that price I will include a new angled or straight distributor cap and rotor.