Ok so im about to get my d16a6 block back from the machine shop. everyboddy says if you stick a vtec head on the block then you need to remove the oil sprayer on the top of the block. why is this?? doesnt it create oil pressure?? also if im not mistaken the z6 blocks have the same things on their blocks. if i remove the sprayer, wont it reduce the oil pressure inside the engine?? i want this engine to be reliable and to last a long time. any opinions on this???