F250 Highboy
New User
Joined: Nov 2002
Posts: 9
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F250 Highboy
I am purchasing a 1975 f250 highboy 4x4. I was told that it came factory with a 390 4 speed. The 4 speed is still in it. It doesnt have a motor. I have a 429 I want to put into it. I already have gathered up a flywheel and bellhousing. I am going to purchase a clutch kit. What else will I need to complete this project? I havent been able to find headers for a 4x4 429 or 460? Also what motor mounts do I use? the most recent motor in it was a 302. The motor mounts to that are still in it. Any help would be great Thanks jeremy:- 
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
F250 Highboy
I don't believe a 429/460 came in that truck. You may have to go to Advance Adaptors for mounts and other items.
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Senior User
Joined: Mar 2000
Posts: 448
Likes: 1
From: Chimacum/Jefferson County
F250 Highboy
Jszbum..........Try L&L products. They will have what you need. Motor mounts and headers.
www.landlproducts.com/
Phone # 972-475-5202
77 F250 Highboy 4X4
"The Money Pit"
"If it wasn't for Chevy's my tools would rust"
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=9893&.jpg
www.landlproducts.com/
Phone # 972-475-5202
77 F250 Highboy 4X4
"The Money Pit"
"If it wasn't for Chevy's my tools would rust"
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=9893&.jpg
New User
Joined: Jan 2003
Posts: 5
Likes: 0
From: Olympia
F250 Highboy
Jeremy,
I noticed you said your 75 Hi-Boy has a 302 in it now? I'm trying to put that same engine in my 75 and am having a heck of time finding the right towers and motor mounts... do you know which transmission is in it with the 302? Does it look like the previous owner had to hack an weld the engine in or does it look somewhat original?
Thanks in advance for any info you have...
I noticed you said your 75 Hi-Boy has a 302 in it now? I'm trying to put that same engine in my 75 and am having a heck of time finding the right towers and motor mounts... do you know which transmission is in it with the 302? Does it look like the previous owner had to hack an weld the engine in or does it look somewhat original?
Thanks in advance for any info you have...
New User
Joined: Nov 2002
Posts: 9
Likes: 0
F250 Highboy
He had the same transmission that came with the 390, he jsut out a small block bell and bolted it up to the 302. Hadnt really looked close at motors mounts but you should be able to just get 302 motor mounts pretty easy
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