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Livrat · 12-26-2008, 10:39 PM

Your 86 should be oval port.. although some had the "peanut ports"..
The square port intake will work on yours as long as you use square port intake gaskets.. (otherwise you will have a big vacuum leak!!)
Using that intake wont hurt but you will not really gain anything other than having an aluminum intake.

12-26-2008, 10:39 PM	#3
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: 1986 454, Square or Oval Port Head? Your 86 should be oval port.. although some had the "peanut ports".. The square port intake will work on yours as long as you use square port intake gaskets.. (otherwise you will have a big vacuum leak!!) Using that intake wont hurt but you will not really gain anything other than having an aluminum intake. Last edited by Livrat; 12-26-2008 at 10:39 PM.