I was looking into either getting the 351 W D0Oe heads or the gt40, gt40p heads but my brother said he had to buy different/expensive headers to fit his gt40's because of the different sparkplug location. Is this the same for the 351W or can I use my tri-ys on the 351's? What about the Edelbrock performer heads? I just got my tri-ys for xmas and don't want to buy different headers. Sorry if this has been asked before but the search function on here isn't the greatest. Thanks.