Hi folks,   I am about to buy an H190 LSD from a guy who had it imported from Japan, however, I am worried about the input flange. I am currently swapping in an sr20det into my 521, so I will need to have a custom drive shaft made eventually. My dilemma is that I would prefer to keep the driveshaft flange the stock flange so I can swap out the LSD to the Stock diff if I please, BUT the H190 flange is not only a different shape, but also has different lengths between the holes than my stock dif