Quote:
Originally Posted by efnfast
Soooooo, I've got 91 IH coming for my 90. That means I need to do something. Are we still using freeze plugs, or have we come up with something better? Thanks Locobob for the heads up on this. This would have been a big stumbleing block trying to do this over a weekend.
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Yep....this thread is a bit old but the technology stays the same
Adapting 91 IH to 90 Heads.
Three Dorman 550-013 plugs (two plugs drilled 7/32) were used to restrict IH PVC ports of the 91 IH (90 Heads do not have the required restriction).
