my 360 combo help

78 360 four barrel motor, 596 head casting smog holes pluged off, double roller timing chain , hughes whiplash cam 504 intake / 515 exhaust with 1.5 rockers matching springs,locks,retainers, alum dual plane intake, my trany is 727 with tci breakaway converter, what size carb should i use with this setup for streets. ? is this a decent combo and what gears should i run ? car is a 68valiant , ill be installing a 8 3/4 , any help with my setup would be greatfull.