I did this hack for my good friend @lorenzo2mars in order for him to convert a Clutch Hitter romboard to Shadow Dancer.
In other words this hack allows to convert newer romboards (with the 315-5436 custom chip) to Shadow Dancer.

I've used romset shdancer, simply use files from this set except for ROMs A5/A6 where you must use my patched files:
filedropper.com/sdanyromboard

1) ROMs types:

A6 -> 27C2001/27C020
A5 -> 27C2001/27C020
B1 -> 27C2001/27C020
B2 -> 27C2001/27C020
B3 -> 27C2001/27C020
B11 -> 27C2001/27C020
A11 -> 27C2001/27C020
B10 -> 27C2001/27C020
A10 -> 27C2001/27C020
B9 -> 27C2001/27C020
A9 -> 27C2001/27C020
B8 -> 27C2001/27C020
A8 -> 27C2001/27C020
A4 -> 27C100/27C1000 - NON JEDEC!
B4 -> 27C2001/27C020

That's 14 * 27C2001/27C020 and 1 * 27C100/27C1000 needed.

2) ROMs positions

Use this conversion table:

Left OG position on 5874, right corresponding position on 5987
A6 -> A4
A5 -> A6
B1 -> B1
B2 -> B2
B3 -> B3
B11 -> B10
A11 -> A10
B10 -> B11
A10 -> A11
B9 -> B12
A9 -> A12
B8 -> B13
A8 -> A13
A4 -> B7
B4 -> B6

3) Jumpers settings

2/4/5/8/10/11
18/14/16/19
25/21/23/28
29/31/33/35/37/39/41/43
45/47/49/51
66/68/69/71

More...