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Re: Possible 261 block with the mystery "M" casting mark GMCanada9430 #1286983 11/11/2018 11:13 AM
Joined: Mar 2007 Posts: 4,215 Holland Landing, Ontario Canad... Leo Moderator
Leo Moderator Joined: Mar 2007 Posts: 4,215 Holland Landing, Ontario Canad...	I ran a Canadian 261 in my truck for many years. The "M" you speak of stands for McKinnon Industries, which was an engine plant in St. Catharines Ontario. My uncle worked there for many years. 1953 Chevy Panel In the Stovebolt Gallery More pix on Photobucket

Entire Thread
Subject	Posted By	Posted
Possible 261 block with the mystery "M" casting mark	GMCanada9430	11/07/2018 4:50 AM
Re: Possible 261 block with the mystery "M" casting mark	sstock	11/07/2018 1:14 PM
Re: Possible 261 block with the mystery "M" casting mark	Grigg	11/07/2018 1:25 PM
Re: Possible 261 block with the mystery "M" casting mark	GMCanada9430	11/07/2018 3:37 PM
Re: Possible 261 block with the mystery "M" casting mark	Pre '68 Dave	11/07/2018 3:42 PM
Re: Possible 261 block with the mystery "M" casting mark	Hotrod Lincoln	11/07/2018 3:59 PM
Re: Possible 261 block with the mystery "M" casting mark	Pre '68 Dave	11/07/2018 11:16 PM
Re: Possible 261 block with the mystery "M" casting mark	Mike B	11/07/2018 4:08 PM
Re: Possible 261 block with the mystery "M" casting mark	Dragsix	11/07/2018 4:36 PM
Re: Possible 261 block with the mystery "M" casting mark	GMCanada9430	11/07/2018 7:13 PM
Re: Possible 261 block with the mystery "M" casting mark	Curt B.	11/07/2018 7:58 PM
Re: Possible 261 block with the mystery "M" casting mark	Hotrod Lincoln	11/07/2018 8:19 PM
Re: Possible 261 block with the mystery "M" casting mark	Curt B.	11/07/2018 10:42 PM
Re: Possible 261 block with the mystery "M" casting mark	Hotrod Lincoln	11/07/2018 10:54 PM
Re: Possible 261 block with the mystery "M" casting mark	Dragsix	11/08/2018 3:40 PM
Re: Possible 261 block with the mystery "M" casting mark	Fox	11/09/2018 4:38 AM
Re: Possible 261 block with the mystery "M" casting mark	Leo	11/11/2018 11:13 AM
Re: Possible 261 block with the mystery "M" casting mark	tclederman	11/11/2018 6:12 PM
Re: Possible 261 block with the mystery "M" casting mark	GMCanada9430	11/12/2018 4:23 AM
Re: Possible 261 block with the mystery "M" casting mark	Grant_Bowker	11/15/2018 1:46 AM
Re: Possible 261 block with the mystery "M" casting mark	GMCanada9430	11/19/2018 3:40 AM

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