.0065-.007 times bore size will give you ring gap for boost.
It will run absolutely fine there NA before the blower goes on. You will not have significantly more blowby NA than an NA gapped ring. As long as they’re seated and oriented on the piston properly.
Naw. I always gap rings wide even on N/A engines. It's just good insurance, especially here in the south where it gets so danged HOT and engines really go through it in the summer.