4.0 manifolds on a 258 head?

Swaping 258 to 4.0, 4.0 parts to 258 etc!
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IH 392
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Re: 4.0 manifolds on a 258 head?

Post by IH 392 »

salgofnir wrote:Have been reading a little this evening. It seems that since I have an 81 with the 7/16 head bolts, I should torque to the 4.2 specs and not the 4.0. Is this correct. I also saw where you torque the outer 4 to 4.2 specs and the inners to the 4.0 specs. Which is recommended here.
You need to torque them to the 4.2 specs, for the smaller bolts, if you torque them to the 1/2 bolt spec you may very well stretch them beyond the yield point!

The '99+ injectors have a different plug on them than the earlier ones and are not a direct fit, they can be modified to work.
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