I made the primer bulb mod about 4 or 5 years ago and it really transformed the ownership experience, as I now have a car that I can quickly start 99% of the time, rather than one that would only start 50% of the time if that.
Obviously you need to open the engine lid and prime the bulb for 10 - 20 seconds or so, but it's a good excuse to inspect the engine bay every trip.
If you use your car weekly, or have an electric fuel pump then it's not a problem.
If you only use your car once or twice a month and have a mechanical fuel pump, I would highly recommend it.
If you want to get oil pressure first, then you can do that before fully priming it!
I have read on the US forums about owners whose cars start but run on a few cylinders for a while until all the fuel passageways fill in the carburettors.
The advice I have seen is that this is because the carburettors are not fully primed.
I disagree as I find that even if I fully prime the carb bowls such that you cannot force any more fuel in with the priming bulb, the car generally starts on a less than four cylinders and takes 5 or 10 seconds of rough running to come onto song.
I keep meaning to try priming the carbs, letting them sit an hour, re-priming and seeing if this fixes the issue.
Still waiting for some final parts to arrive to get mine back on its wheels - so with the poor Xmas post might be after Christmas now
