Thanks for your responses. I ordered a J-pac from Ultimarc to make things easier. I know I could have done it with a Jamma board and some soldering but it seemed like more work than I was willing to do at this point.
I didn't order the ArcadeVGA as I think my ATI All-in-wonder 9800 can output to an arcade monitor if I use the Soft 15Khz drivers that someone developed.