Edelbrock heads on a 340 with KB243 pistons

This motors going in a 1939 Plymouth coupe with an automatic and 3.23 gear. I was going to run a small cam, about the same as a 68 340 cam, 441 lift and 260 something duration. I might be better off just using my iron heads. This car is for my 83 year old Dad to drive so it don't have to be real bad ***.