I need more timing adjustment

Stick with the carter,you won't see much difference by changing to a holley. I think that # petronix is for the # 1 and is a easy swap.The Petronix # 2 requires their coil with the correct ohms.Been using their stuff for 10 or so years without a hitch.Read the instructions,before and during the installation so you don't miss anything.You will be good to go.