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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Mar 2005 Posts: 1,513 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,513 | I have a couple of Canadian Pontiac 261’s both of which have 3836848 heads with steam holes that I am certain left the factory that way from GM Canada in Oshawa. I have also read several times that the usual practice for using this head on a 261 in the U.S. is to simply use a head gasket as a template for drilling. The steam holes in both my heads are at a 12 degree angle toward the manifold side which has me wondering if the holes on a U.S. 261 are drilled perpendicular to face or tilted and if anyone who drilled them straight had difficulty intersecting the water cavity on the one very close to a head bolt? Here’s what I’m talking about and thanks for insight from anyone who knows what’s up with this.
1952 1300 Canadian 1/2 ton restomod You Tube | | |
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