Engine upgrade help
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Junior User
Joined: Feb 2006
Posts: 64
Likes: 0
From: Colorado Springs
Engine upgrade help
Need some help here, I've got a 1970 F100 w/302. Looking at upgrading the motor. Looking at a 400 (6.6L) from a 1978 F150. Will this work and what problems am I looking at if it will. Or would it just be better to go with a 390 from a 68-76? Or what would be the best fit? Thanks for the info.
Junior User
Joined: May 2011
Posts: 78
Likes: 0
From: San Diego, CA
If you're upgrading I'd stick with a small block, like a 351, lots of mods you can do to get them powerful enough and still easy to find parts for. The FE engines are a little more of a hassle. Atleast in my experience. And the parts are also a little more too. But there is always the 460 too which is a Big Block. Just my two cents, but I'm sure others with more knowledge on the subject will chime in.
Logistics Pro
Joined: Jan 2011
Posts: 4,762
Likes: 54
From: Antelope Valley ,CA
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Senior User
Joined: Jan 2011
Posts: 110
Likes: 0
I agree with Mikes and Rogue. After returning my truck back to an FE (with trans and driveline) from a 429, I'd go with a 351W any day. Find a 351w that will mount to your existing trans and beef it up.
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Senior User
Joined: May 2010
Posts: 369
Likes: 2
From: BC Cana'duh
I agree with the Windsor.Much better engine and has more torque than the 302.It's also cheaper for parts than the FE or the M-series engines.Plus as stated it'll bolt up to your existing drivetrain.That's a HUGE benefit.Just be sure to get the 351w flexplate.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
As others have said a 302 or 351W is a direct replacement. As noted the I6 will bolt to the bell with different engine perches.
You take your time, I bet you will work something out.
John
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
It seems like most of the 302 headers don't seem to fit the 351. That's just what I read on the forums, not personal experience. As of a year or two ago, nobody made headers to put a 351W into a bumpside chassis.
