Perhaps we should better-define what constitutes a "bug".
Since Backdraft's are sold turnkey-minus, the trans, engine, and engine management system are all unknowns at the time of production (typically). As such, I'd expect there to be a few electrical bugaboos... in addition to issues with the clutch slave, depending on the what's installed.
My car's been pretty trouble-free for the last two years... my issues have been relatively minor...
no brake lights... brake pressure switch failed... $15 at Napa. Not exactly an unexpected problem given the proximity of the pressure switch to the headers.
no parking lights... bad relay. Again, a very minor repair... no big deal.
Other than that... not much to report. Biggest concern for me is making sure I keep all the nuts & bolts tight... a challenge with solid motor mounts... and most of the aformentioned nuts & bolts are engine related... not chassis related so it's really not a Backdraft issue.
I focus mainly on keeping the header, intake, carb, and
oil pan bolts properly torqued, & usually go around the engine once every month or so. Probably 3-4 times a year, I'll put the car up on jackstands to check & clean the chassis. It all goes with the territory...