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ChadS
10-14-2004 08:48:33
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Re: Same thing for the M's too! in reply to DWV, 10-13-2004 17:39:47
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All of the 8060, and like heads do have the same valve length, longer than the newer head. So, yes a correction from my post. The compression chamber design, and ports are more open and straight thru, like the newer heads. Also, when the firecrater pistons came out, the older heads could not use them, unless, the heads were ground out to make them clear the pistons. So, a casting change was in order. Now, in answer to why the valve length did not change in the 8060s in the later years, and this is just a guess,, the Super M, came out in early 52, IH never changed the valves in any of the heads until 53-54. First one to have a valve length change was the super H. After that, then they started doing the same modifications for the Super M getting ready to make the MTA, and 400. I guess I can also say is that the years I stated for the heads are off by 2 years,, Forgetting that there was one more model inbetween the super M, and the 400, and that was the MTA. Which would probably be where to find the older casting # with the better flow design and chamber. Most better parts I have found came from the 52-56 production years. Possibly the 8574D is the late head before the 362174?? ChadS
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