edelbrock heads on a 318

..........U r way better off with the 85-91 #302 head......they r a 25 hp bolt on over the x or j head.......318s dont need and cant use the big 340-360 intake ports, unless it is an all out hi comp race engine.......4 best driveability and bang 4 the buck #302s r the only way 2 go........kim.......