Looking for info on 340 Torker performance mods

Brooks James said
Yes, maybe more, last one I saw was for LD340.
BTW what does LD stand for

i'm guessing and this may be a bit of a stretch, but it *might* be "Late Design"

maybe it's something along the lines of:
D4B- Design 4 Barrel
LD4B- Late Design 4 Barrel
LD340- self explanatory