1974 Dart 440 tuning help

I finally got this car dialed in good with lots of troubleshooting and help from you guys. locked my timing in at 36 degrees and it runs smooth all the way up to 6500rpm. and i've got exhaust put on with a air fuel gauge and even with my tight love separation it's helped me sort out idling and wot tuning. i appreciate everyone's help a lot. now that im here i just want to discuss what a/f ratio would sound right for my engine. it's a stock stroke 440 with 2355f pistons. stock cast heads with isky 505 cam with 108 lobe seperation and lots of duration. ive got an 800dp on it now and it seems happiest out of all the carbs. this is the only carb i've used where the engine reacts to the idle a/f screws lol. 3500 stall converter and 4.56 gears. at idle i've got around 13.2 a/f ratio, about the same at cruise, but WOT it goes leaner to 15- 15.5. i've got a 3.5 power valve in the primaries and 5.5 in the secondaries and 72/74 jets in the carb. 10lbs of vacuum at idle. should i just jet up the secondaries to get a more rich WOT? i'm sure im leaving some useful information out but i just want to get it tuned in as best as i can before i run the track again. my goal is to run better than my 9.1s 1/8th and 2.0s 60' from last time ha.