How to build a 13 second 340 Duster

On the comp I would shoot for no more then 10.0 on iron heads. If it is a good quench eng then you might get away up to 10.5 and still use 93 pump. But you will need to check it as alot of the Mopar engines were a bit lower then advertised comp. Most 440's rated at 10.0 were in the 9.0 to 9.5 area so definetly you will need to check and machine for the right comp. Ron