I just went through the LB-1 bridge vs neck doubts with a reissue S200. I tried adjusting pickup levels, swapping the bridge and neck pickups, and finally installing a second neck pickup in the bridge position. Much has been said about how these pickups are not "matched" in a vintage correct fashion, which is no doubt the case as vintage minibucker guilds appear to have used the same pickup in both the neck and bridge position. Where I am not so much in agreement is as to whether the pickups in the newark street are "mismatched" for level in a practical manner. Undoubtedly they do have different resistances -- however I have not seen measurements (nor have I made them) of their inductance which would be the more appropriate measure of their output. I suspect they may be pretty close as my observation regarding the bridge position after installing one of the neck pickups in that position, is that the output level is pretty much the same as when using the original bridge pickup. Ie the factor impacting the level is maybe not so much pickup related but the difference in string vibration at the two positions.
The neck pickup in the bridge is a bit less bright/sharp sounding, but for level matching and for finding a good blend for the dual pickup mode, I found that the height adjustment relative neck to bridge was just about the same using a neck pickup in the bridge position or the original bridge pickup.
I did find the bridge to be maybe a bit to biting and I usually backed off the tone when using that pickup, and since the tone knobs are set for rhythm/lead switch rather than per pickup it did make switching between modes require more adjustments along the signal chain, but I'm not convinced that putting the neck pickup in the bridge position is really much of an improvement. It is different, maybe not better, and I think certainly it offers less tonal variety than the original bridge pickup.
The most important thing I found is to set the pickup heights to a position where the levels are similar for each pickup and where there is a distinct tonality for the blended two pickup selection. This means quite high bridge and rather low neck, however the position that worked for neck/bridge or neck/neck installs were close to identical.