To add a little flair to my racing game enjoyment, I decided to upgrade my Scud Race ROM board to Plus. A very worthy upgrade with the Super Beginner course and cool FMV intro, and for someone new to eprom programming, it's a great start.
You will need to change ICs 13, 14, 15, 16 and 24 with 27C322 and burn them. Be careful if you download the MAME ROM set; the mpr-20101.23 is actually IC24 on the PCB. I accidentally placed this in the wrong slot with the original chip still in the other and the sound effects were all garbage.
Additionally you will also need to burn ICs 17, 18, 19, 20, and 21 with 27C4002 (27C4096 equivalent). So 5 27C322 and 5 27C4002 is all you need.
The chips all burned fine on a GQ-4X4 programmer, at max speed, with the 42-pin socket adapter, with jumper J1 on the socket adapter jumped to pins 2 and 3 from factory-default pin 1