VMCA2 not quoted for the -400 in any Boeing manuals that I have, seem to remember a figure of 157kts for the -200(R-R) and 162 for the -400 from a conversion course instructor some years ago (but nothing in print!).
VMCG for the -400(P&W), using TO1 at sea level is 116kts.
Aileron into the live engines would probably be required during a 2-engines go-around. (Not recommended by Boeing after gear down, but achievable provided not attempted too late on in approach).