Here's a nice guide to leg sizes:

http://www.pbresource.com/legs.html#most

Also, I generally run my front legs all the way down and just do adjustments with the back legs. Seems easier this way, plus I have some DE games that always seem way tall to me.

https://pinside.com/pinball/forum/topic/legs-size-help

personal decision. Mine are all the way in in front--and I remove the nut as well if there is one to make them even "lower". The back I put all the way up...I've even put on some 3 inch levelers on the back on some games to give me a little more room to adjust. I have a digital level and usually go for around a 5 degree slope on EM's. Originally they were 3 1/2 I think factory--too spongy for me.

I summarized for my records the following Gottlieb wisdom from other EMers here. If there are exceptions, please let me know:

If it has the SMALLER coin door, the leg holes are higher and therefore requires BIGGER legs (31 inch).

If it has the LARGER coin door, the leg holes are lower and therefore requires SMALLER legs (27 inch).

12/75 started the deeper "Columbia Pictures" bottom cabinets and larger front coin door and 27" non-ribbed legs (prior to this, all 1956 to 1975 Gottliebs with metal legs were 31" long).

small door.jpg
big door.jpg