451 head ?

[IA Case]

Hello I'm having difficulty finding out exactly which head a 1070 would have had on it. I have come up with 5 different small valve heads all of which have different casting # stamped in the head. Are the 401 heads from a 970 the same as 451 from a 1070,1170,1175 and 1270? I'm just wondering if the NA tractors have the same head as the turbo charged tractors. Any help would be appreciated. Thanks

 

[rdl]

The 970 heads have smaller valves and the valve guides are spaced closer together because of the smaller bore.The other 451 heads have the same size valves but have hard seats for both intake and ex.valves

 

[IA Case]

I didn't think about the small valves in the 401 , but would all the 451 heads be the same turbo charged or not ? Thanks for the reply