The cam is very, very important in an automatic car, I would suggest a custom grind.
I just finished a car for a customer, 331 10.6:1, AFR 185's upgraded springs, FTI custom cam, RNH Performance ported Typhoon intake, 70mm TB, 75mm MAF, 30# inj. It had a AOD rebuilt by PA, very mild build, A-servo, upgraded valve body, good clutches and bands, PA/PTC Converter, 4:10 gear.
Car runs great and really impressed myself and the owner is very happy
Contact Ed Curtis
www.flowtechinduction.com about a cam, best $325 you will ever spend. The Holley is a good piece but really will not match up to the AFR heads very good, a RPM or RPM II would be a better match out of the box.
For a converter you may want to check into Andre @
www.edgeracingconverters.com
What are your plans for the car?