Rb25 Head Prepping

[evoeta]

hey guys, im sorry if this has been covered, if it has then please link me cause that would be super.

im building a 30det like im sure everyone in this section of the forum, ive just gotten myself a r33 rb25det head, it came off a mint rb25,

never used on a RB30Det, now what will i have to do in the way of prepping it to slap it on the block? ive got the oil feed and drain thing sussed, and im using a Cometic 4 layer rb30 head gasket, ive heard that you have to grub screw or weld some holes up? and is there anything else to do? any help would be super cause i would lover to get her back on the road!!

ill try attach some pictures of the head to give you guys a idea of what im working with here

[Crazy Xav]

Forced induction section theres a full thread on RB30/25 engine builds