bad86z28

I just changed out my old, brittle header gaskets, but instead of using round port gaskets, I had to use square port gaskets. The square ports were the only ones I could find and I really needed to change the gaskets. I guess I got lucky on the passenger side, because its not ticking at all. However, the driver side is ticking. Are the square port gaskets causing this? Only one side is leaking. Seems strange that only one side is leaking. Should I get some round port gaskets and change them again?

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Black 1986 Z28
305
Edelbrock Performer intake, Edelbrock 600 cfm carb, Hedman headers, Flowmaster catback