That right there looks like a really cool board! This one in particular has never hit my radar... it has now!
To have the Kickstart ROM + an accelerator + what looks like a battery backed up RTC hits most of the major buttons. The only piece it really lacks, if I want to be greedy, is a way to upgrade Agnus.
In any case, very cool. Thanks for sharing that. I'll poke around and see if I can find anything, too.
I wouldn't be surprised if there were some jumpers or wire leads to this and that required for use. I'm assuming it would need a CPU offsetter, too, and you'd keep the daughterboard installed? (Would be a tight fit!)