I ended up replacing the TPS on the Nomad after it caused a backfire - that backfired so hard it bent a pushrod... Seems it was "breaking down" and the ECU didn't know where the throttle was. That part went south quite quickly though, once it went. That was 4 or 5 years ago and that part has never given me trouble since then.
I also had trouble (several times) with their Dual Sync distributors.... (I was an early adopter - too early as it turns out
) which was the major reason I stopped using Accel and switched to the non cam signal EZ EFI... Seems that OIL can get up inside the distributor and cause all manor of issues -- PARTICULARLY if you have laid the distributor on it's SIDE after it's been installed etc - so it has oil on it.... A simple disassembly and cleaning was all it needed and bingo - it was fine again.