55 head on a 404 June 11, 2010 01:44PM
will a 55 series bolt on to a 404 with out machine work

Re: 55 head on a 404 June 11, 2010 03:55PM
It will physically bolt on but I have not heard of anyone that's made the 55 work on a 4.25 bore. 40 series works better on the small bore.

Re: 55 head on a 404 June 11, 2010 11:37PM
Yes, it fits but the valve spacing is too wide for 4.25 bore.
You will have to notch the sleeves to make it work, and hope
your sleeves don't move.

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