Heat gasket

I have been thinking about running one of these:

http://www.summitracing.com/parts/EDL-9266/?image=large

I have been having some heat soak issues with my edelbrock 1406. I wanted to run a 1/2 spacer but I wouldn't be able to shut my hood with my setup. My concern is shouldn't these gasket be a four hole instead of the split? My current gasket is a four hole. Does it make any difference which way I go? Has anyone had any luck with these.

Thanks for any info.