302 to 400
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Freshman User
Joined: Apr 2007
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Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
You can just get a bellhousing for a 4 speed with a 400. If you use a bell from a later truck with a 460, you can also upgrade to a hydraulic clutch. The bells are different, so make sure you don't have to convert unless you want to.
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
Keep that parts truck handy so it will supply you with all the extras you will need for the swap. I hope it is a good running engine?
You can do what was just mentioned for the 4 speed manual, or get a C6 from a 351M/400 or 460 truck; They are the same thing.
You can do what was just mentioned for the 4 speed manual, or get a C6 from a 351M/400 or 460 truck; They are the same thing.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
well honestly i dont thinks its a worth while swap. would be easier to drop in another 302. the gas mileage from that 400 will be terrible, they have decent torque but low on HP and are heavy
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Freshman User
Joined: Apr 2007
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I'm not trying to be an idiot or anything, because I have never ran one... but there are lots of mixed emotions about the 400. From what I have read, some people hate them and some swear by them. Do you think its really not worth the swap? I dont want to buy a 302 if I have a good running 400, is there anything you can do to the 400 to make it decent?
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Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
I would take a 400 over a 302 ANY DAY, especially in a truck. I would even take a stock, smogged 400. Ever try to pass someone on the highway with a stock 302 in a 1/2 ton???
Worthwile swap dude, DO IT! You've got all the makings of an easy swap at your disposal.
Worthwile swap dude, DO IT! You've got all the makings of an easy swap at your disposal.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
to make the 400 run you have to put money into head work, get the compression bumped up and a cam swap.
the 302 will run better and pass better in stock form then a stock 400 would.
good luck with the swap. if you know anyone that has a stock 400 in there truck see if you can ride with them or even drive it.
the 302 will run better and pass better in stock form then a stock 400 would.
good luck with the swap. if you know anyone that has a stock 400 in there truck see if you can ride with them or even drive it.
Lead Driver
Joined: Aug 2002
Posts: 6,682
Likes: 12
From: Saskatoon SK Canada
Technically I did the opposite. I put a 302/AOD in place of a 400/C-6 and was a direct bolt in. Just I also changed bodies as I'm using the 78 chassis as the foundation for my 51 truck. The 400 was a good motor but it had seen better days (approx 180 000 kms) and wouldn't get you anywhere fast. The main reasons were EFI, overdrive and fuel economy which the 400 couldn't supply easily.
I'll have the Roast Duck
Joined: Jul 2002
Posts: 9,622
Likes: 110
From: Northshore, MN
strictly in the name of money, go with the 400. keep everything for the 302. Eventually rebuild the 302 for future reinstall when the gas prices are too high. FWIW, I got 10 mpg out of my 79 Bronco 400/C6, and 18 mpg out of my 85 F150 302 EFI/AOD. Both at 55mph. The '85 can't pass anybody on the highway, either. It's really tired, and the 400 is retired, lol.
