You have an option of 3 different boards. Each has it’s pros and cons. I have them in order on this page from least expensive to the most expensive. That is also how they are arranged in features as well.
RottenDog’s Gottlieb System 80 CPU/MPU replacement board.
This is the low end of MPU replacements. It uses modern technology and is well built. But they aren’t adding any bells and whistles like a skill shot.
Ni-Wumpf’s Gottlieb System 80 CPU replacement board.
Pascal’s Gottlieb System 80 All-in-one replacement board.
This bad boy is the MOST expensive! However, it has the most features. It actually replaces not only the CPU, but also the driver board and power supply boards! All in one single compact board!