I-D my 440 heads
I wouldnt say worthless..... they are easy for a machine shop to put tbe bigger valves in, flow literally the same as 906s and respond well to basic porting. With the bigger valves they are pretty much the same as the one year only closed chamber big valve 67 440 heads. I have run a couple sets this way in the past and currently have them on the 440 in my 55. They are a great budget head and with the closed chamber make more compression than the factory open chamber heads.
I wouldnt say worthless..... they are easy for a machine shop to put tbe bigger valves in, flow literally the same as 906s and respond well to basic porting. With the bigger valves they are pretty much the same as the one year only closed chamber big valve 67 440 heads. I have run a couple sets this way in the past and currently have them on the 440 in my 55. They are a great budget head and with the closed chamber make more compression than the factory open chamber heads.
