351W head accessory bolt size

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Jul 21, 2007 | 06:06 PM

fmc400

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MSEE

Joined: Apr 2004

Posts: 10,386

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From: Austin, TX

351W head accessory bolt size

I'm pulling my 351W using the accessory bracket bolt holes in the top corners of the cylinder heads - I'm going to chain to opposite corners. Can anyone tell me what size bolts go in there? Thanks

Jul 22, 2007 | 01:20 AM

Putt

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From: Colville, Washington

7/16 coarse thread. Just reinstalled the 5.8 in my '89 today.

Jan 22, 2025 | 09:19 PM

Canteen

1st Gear

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Quote:

Originally Posted by Putt

7/16 coarse thread. Just reinstalled the 5.8 in my '89 today.

are they all the same? on my alternator side i have 2 holes that are smaller and the bolts won't thread into the head even with the bracket off and I dont have any other hardware that seems to fit. Mines a 1991 f250 351w the engine came from a 1994 but it was identical to my engine. I've had it together once but I mustve misplaced the hardware.