Im swapping out my manifold from my 94 VX and puttig in a y8 manifold. which gasket do i need the one that fits my block or the manifold?

 

i think y8 gasket

and btw...there is a little trick of putting on the center/lower nut on the mailfold (without going under the car and taking off the oil filter and stuff)....the y8 IM should have a hole in center were the pcv hose come out....there u can see that center nut....just use a wrench....and sneak in there....i just swaped out my IM

 

You need the Y8 gasket. Make sure you clean the old one off really well, I would recommend picking up some liquid gasket remover. What year is your IM from? If its a 99-00 beware of the air injection holes. You will need to seal those up.