302 Engine Perch Bolt Size
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1st Gear
Joined: Jan 2024
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302 Engine Perch Bolt Size
I am in the process of getting all my parts together to install a new 302 in my 68’ F100. I am changing from the FE 360. I already have the correct perches from a donor. What is the proper size and length of the bolts to connect the engine perches to the truck frame?
I am new to the hobby and cannot find the info in my shop manuals.
I am new to the hobby and cannot find the info in my shop manuals.
Lead Driver
Joined: Jul 2017
Posts: 9,597
Likes: 1,172
From: San Jose, CA
Funny, but I thought the truck perches for the 302 were welded in place in '75 instead. So obviously I'm no help.
Even my '79 with 400 has them bolted in though, so maybe I'm thinking about the Broncos only. But I thought I remembered them being welded.
I'm guessing you know they're bolt-in, because you already have the donor perches.
Did you remove them from the donor yourself?
Sorry don't have your bolt size answer. They're probably 7/16 or 1/2, but that's just a SWAG (scientific, wild-assed guess) just randomly thrown out there!
If so, in a pinch you can tell from the size of the head about 90% of the time. Or you could just remove one to verify.
I wonder if they're different between 2wd and 4wd.
Good luck.
Paul
Even my '79 with 400 has them bolted in though, so maybe I'm thinking about the Broncos only. But I thought I remembered them being welded.
I'm guessing you know they're bolt-in, because you already have the donor perches.
Did you remove them from the donor yourself?Sorry don't have your bolt size answer. They're probably 7/16 or 1/2, but that's just a SWAG (scientific, wild-assed guess) just randomly thrown out there!
If so, in a pinch you can tell from the size of the head about 90% of the time. Or you could just remove one to verify.
I wonder if they're different between 2wd and 4wd.
Good luck.
Paul
Logistics Pro
Joined: May 2015
Posts: 4,468
Likes: 962
From: Tri Cities, TN
I am in the process of getting all my parts together to install a new 302 in my 68’ F100. I am changing from the FE 360. I already have the correct perches from a donor. What is the proper size and length of the bolts to connect the engine perches to the truck frame?
I am new to the hobby and cannot find the info in my shop manuals.
I am new to the hobby and cannot find the info in my shop manuals.
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
Ford lists 4- 7/16" - 14 X2" bolts and 2- 7/16" -14 X1" bolts support to frame for Econoline vans. No F100 listing, probably the same.
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Cargo Master
Joined: Oct 2011
Posts: 2,242
Likes: 299
From: Kenner,La.
Perch bolts
Crop Duster is right. The original ones are 3/8” 16 with self locking nuts. A real PITA without a air ratchet.
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