I have a 1957 , 312ci, with G head pretty much stock set. My question is it came with the Summit open spacer gasket . Should I use it or use the 1” spacer ( 4 hole )? This is a car that is used for shows, and some street drive, but like to have a little giddy up go now and then. Not good at tuning but have been have been trying to learn but seem to get over loaded and mixed up. So any and all help and advise is welcomed. As this group is the best source for us that are note to bright. So thanks for all past help and for being there to keep the Y-Blocks forever going strong!