351c 4v headers
Laughing Gas
Joined: Dec 2012
Posts: 801
Likes: 7
From: Toledo, Ohio
. Feel free to send us all a case of beer for our help...
. So, you think the 2V headers are hindering the performance of your 4V engine in the woods?
. So, you think the 2V headers are hindering the performance of your 4V engine in the woods?
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
header stuff.
did a 400 ford with 4v heads. had to change out the flange to the headers and run outside the frame. not a hard job but tedious and took 2 weekends to complete. being your 351 Cleveland with 4v heads is a shorter deck height might need to add a little pipe to get outside the frame. check out some of my photos and you will see my headers on my orange crewcab. the headers are hedman fenderwell exit and 351m400 2v headers and bought a 4v flange from jegs and welded up. tedious and lots of work but good fit. had to do a filler inside header pipe for proper transition from 4v head into pipe. also ran mpgheads exhaust port plates to help on dead spot on lower part of port. Truck is a 1970 crewcab 4wd 400ford with 4v heads. I also have a set of 351c 4v exhaust manifolds that might work in the Cleveland??
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
Have you upgraded headers?
did a 400 ford with 4v heads. had to change out the flange to the headers and run outside the frame. not a hard job but tedious and took 2 weekends to complete. being your 351 Cleveland with 4v heads is a shorter deck height might need to add a little pipe to get outside the frame. check out some of my photos and you will see my headers on my orange crewcab. the headers are hedman fenderwell exit and 351m400 2v headers and bought a 4v flange from jegs and welded up. tedious and lots of work but good fit. had to do a filler inside header pipe for proper transition from 4v head into pipe. also ran mpgheads exhaust port plates to help on dead spot on lower part of port. Truck is a 1970 crewcab 4wd 400ford with 4v heads. I also have a set of 351c 4v exhaust manifolds that might work in the Cleveland??
Posting Guru
Joined: Nov 2008
Posts: 1,937
Likes: 2
From: wyoming
Fender well exit headers headman 89360. Buy 4v header flange cut off 2v flange, weld in new 4v flange. This not a simple process! Being you really need weld in some filler on btm of port for best flow results! I pulled my front clip off truck so I had room to do what I needed. Can do this to any 400 header in frame or fender well exit. Will take couple weekends to complete! Depending on work schedule?
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