so i have a b18b1 with a bent valve so i’m swapping the head off the old motor a b20b4 with a matching p75 head i got it machined and i was planning on using a b20b head gasket because that’s what everyone online is saying so i just want to make sure because it doesn’t sit right with me can anyone verify?
which head gasket should i use!!!!

 

I think the rule of thumb is whichever head you're using, get the gasket for that head.

 

Not when the b20b4 has a larger cylinder bore than b18b1.

 

Considering that the block determines the bore, that's not a great rule of thumb.

B20B4 head = B18B1 head. Use the stock B20 headgasket.

 

you guys are confusing me i’m doing the job this sunday so i’ll be good using the b20 gasket when it’s a b18 block and b20 head YES? NO? and any other things i should know maybe thank you!!

 

That's not what you said and you should have been more clear. Use the head gasket for the block you're using.

 

Punctuation and sentences are dead.

Yes. Use the B18B/P75 gasket.