New! First foxbody Need help settin idle

Hi name is Matt. Well sherryis my first 89fox shes got a Gt 40 motor with gt40p heads also a trickflow stage 1 cam and pullies as of right now. Now not sure how i should set the timing i heard a lil retarded with a lil lean how should i set it?
 
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there is an idle scew. if your having idle hang time. or surging then try cleaning your salt and pepper shakers, the white and black connecters between the firewall and the intake. if that doesnt research how to tune in your Trottle positioning sensor.