I did a distributor about 25 years ago with welding up the slots but cant remember what side I welded up.. Is it the inside of slot or the outside of slot?? I seen on abodies that there was a thread and it had welded up the inside. By looking at pictures of the FBO plate it looks like that it limits timing by taking up the space on the outside of the slot, Make any sense? LOL Ive got the measurements for welding of the slots/timing. So what are some opinions. Inside slot, outside slot or just getting a FBO plate? THANKS