Conversion Ignition to Transistor Ignition

Hi@all, would like to convert the interrupter-controlled ignition of my 2.0L Ford OHC/gasifier to one of these contact-controlled electrical ignitions, which are now offered everywhere. Now my questions: a) can you use EVER of these offered 12V variants or are there (in addition to the price) differences ? Does it even matter which distributor (-type) is installed ? b) Is there also the possibility to convert to completely contactless without having to spend several hundred euros ? I am grateful for every tip ! 😉 Greeting «LuxXxus»