Hey nismogts-x
Calm down and listen
Your two photos sho Fa of teh head just of teh top of two very different manifolds NICs 12 dual intake runners and the HR31 Eccs 6 runners but both go into the same butterfly plates into the same 12 port head.
take the manifolds of either of those engines and your still going to get this
http://www.users.bigpond.com/maytech/skyli...b20eccshead.jpg
I know Ive dont many times. Works Auto knows it too also having a HR31 Eccs 12 port head and his friend with a VL whos head been off twice another hr31 eccs 12 port head. As in we have done this ourselves we are not net parroting, we are not spreading hearsay, we are not quoting for somebody else who has done teh work.... 1st hand account
Ego aside
HR31 is 12 port either NICs or ECCS
If we keep it one brief post at a time we can get through this and Im sure we'll all learn something