[QUOTE=63gmc4x4;78220]
Quote:
Originally Posted by OlsonsGaskets
Had a little time today to look into this Ebay posting. Looks like I was a little too hasty in my previous post. I sincerely doubt this will work (see picture for comparison).
I actually bought that from eBay that posted to try it out , i pulled out my original one in my 401 this morning it was a rubber one and it's stamped GMC on it. I should have taken a picture to compare the two before I installed it and match it up to this one from eBay and it's exactly the same. I installed it this morning. Fit perfectly!
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Good to hear that it fits! Was the sealing surface left stock on your 401? (i.e. with the serrations?)
@Olsonsgaskets I believe the plugs is concave to clear the 12 point bolt head. Suppose you could make them a little shorter to cut down production costs.
If you need any measurements of the NOS rubber seal (17091) that I posted pictures of, contact me.