Goal 1990 s13 w/ABS swap to lsd diff w abs

[jklein]

I need your help.
The Goal is to have my 1990 S13 ABS car converted to a working ABS LSD car with 4.08. Rear gear.

Some Parameters:
The output flange on S13 ABS is 6 bolt 3 groups of 2.
The drive shaft on S13 ABS is four bolts.
I already have a one piece matching drive shaft.
The 300zx non turbo is too long and has the wrong ABS configuration. (4.08)
The J30 95+ has the correct ABS, The correct length (3.96)
Can’t find enough information on M30 is the same length as abs 204sx?
DO not want the clutch plate type units with frequent special oil changes.
Where do I find 3 groups of 2 bolt pattern flanges to fit

Possible options:
Silvia S13?
Silvia S14?
Canadian S13
Canadian S14
Domestic Unit with ABS and LSD.
Where do I find 3 groups of 2 bolt pattern flanges to fit Silvia units will my 240’s work?
Change 3.96 gear on J30 to 4.08?

Please help me Money is important.