so..... my engine is a 1987 mercruiser 260hp 350CID, i have my manifolds and riser elbows off, and i noticed that the elbow gaskets have the 2 larger holes and 2 small holes in them. i ordered by mistake this past winter the gaskets with the 4 larger holes, without the 2 small holes..... do i NEED the gaskets with the smaller holes in them? im not sure what the purpose of them are.... im not if i will experience any heat issues using the gaskets i have now with the large holes in them.... i am broke but if i need to i will hold off to get the other gaskets...