360 Performance Suggestions Wanted

Hey all, I have a built 360 with Keith Black pistons, MP 292/508 cam, M1 single plane intake, carter thermo quad 850, 4:10 4 speed in a 1969 Barracuda I just bought and I am looking for things that could increase performance. I just bought new RN12YC Champions spark plugs and I'm not sure what distance to set them at. Any suggestions about anything performance wise is appreciated. Thanks.