Jeting a 750

i have a stock 360 in my car now with headers and a performer rpm as the only mods. i'm running a 750 vac secondary carb with 72 front and 75 rear jets... forget what spring i have in there but i know its not the short yellow. if you really need me to i can check since it has a quick change kit on it...

My thing with the jeting is when I try jets like 72-76 always seams too rich.My idel is always around 900 so the transfer slot is not exsposed causing an over rich problim.If you stand behind your car with thoes jets does the exhaust burn your eyes? What do you think about the gr4 ngk plug to cold thats what i have in my 360 now plugs have no real hard passes yet and are a tad dark no fouling tho.Just wondering.No take you spring out thats ok thanks tho.One more thing is I just got my Mr gasket #925b advance springs and just looking at them I cant tell witch one is the light spring.