Quoted from tjc02002:There’s 2 versions on the alltek too.
One is the factory version, the other is Olivers V4.
Oliver has a V5 patch available on his web site.
Quoted from pintuck:Should I go for the V4 or Oliver V10?
There's not a whole lot extra in V10. Try V4 or V5 with the 2732 EPROMs and if you like it then consider V10. As slochar mentioned, weeblys (https://nvram.weebly.com/new-pcbs.html) MPU board has a built in expanded ROM socket so directly supports larger EPROMs.
Below are the jumper settings for two 2732 EPROM chips on the Bally-35 board. Make sure you remove any 2532/9332 ROM jumpers that conflict.