Edelbrock aluminum heads 60179 or 60779?

Hey guys!

I am not sure which head to go with? I have a 68 340 with factory J heads on it now. The motor and heads are not original to each other though.

Edelbrock 60779 Edelbrock Performer RPM Cylinder Heads | Summit Racing

or

Edelbrock 60179 Edelbrock Performer RPM Cylinder Heads | Summit Racing