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#577609 - August 05th 2012 8:40 am Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
Doc 2% of Canada, EH!!!! Offline
Vanner

Registered: June 10th 2003 12:00 pm
Posts: 12693
Loc: Burlington, On, Canada Eh !!!!
My 1980 300 went 350,000 miles ...the carb was only good for 60,000 at a time however....a swap to the 2 barrel helped a lot as well and with a 290 rear end got 24-26 highway in the short box.....

It was also my first van built with bed, cabinets and floor of 3/8 plywood in stead of 3/4 inch , so I saved a ton of weight..
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#578368 - August 09th 2012 11:06 pm Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
VanLoon Offline
enthusiast

Registered: August 11th 2007 11:18 pm
Posts: 346
Loc: Chicagoland, Illinois
I swapped from a 300 sixer to a 351w into my 83 years ago.

It was easy, only because I pulled the 351 from another van.

Oil pan and pickup,
front motor brackets,flywheel,driveshaft and radiator
300 is different than the 351 . The flywheels dont interchange.
Trans was the same had to move the crossmember forward and tweak the shift rod if I remember correctly.

Id keep the 300 with the current cost of gas.

I used to get 15 MPG highway with the 351/C6,3:00 rear.

Re-curved distributor,performer cam,shift kit,dual exhaust,flex fan,good tires.
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#578375 - August 09th 2012 11:50 pm Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: VanLoon]
tide Offline
old hand

Registered: August 11th 2011 9:24 pm
Posts: 733
Loc: charlotte n.c
I'd keep the 300 also with gas going UPPPPPPPPPPPPPPPP


Edited by tide (August 09th 2012 11:52 pm)
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#579057 - August 14th 2012 8:49 pm Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
maples01 Offline
pooh-bah

Registered: October 02nd 2002 12:00 pm
Posts: 3294
Loc: Maryville, TN
A 300 with injection will go beyond 300,000 miles, a friend got 20 MPG with a C-6 transmission in his 95 E-150, the odometer has 346,000 miles on it and hasn't worked in 5 years, it's sluggish, but likely due to the factory injectors and check engine light. The 351 was great when gas was below $2 a gallon, it's heading for $4 now, hotrods aren't affordable.
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#579587 - August 18th 2012 1:16 am Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
Reed Offline
carpal tunnel

Registered: August 27th 2001 12:00 pm
Posts: 8377
Loc: Fircrest, WA
I have a 351W in my 89 Ford, and I am seriously contemplating swapping it out for a 300 when I go to reinstall the AOD transmission. I would definitely keep it fuel injected, too.


The 351 is fun, but at $4 per gallon I can't afford to fill up 36 gallons every week and a half. frown


Edited by Reed (August 18th 2012 1:17 am)
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#579588 - August 18th 2012 1:36 am Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
maples01 Offline
pooh-bah

Registered: October 02nd 2002 12:00 pm
Posts: 3294
Loc: Maryville, TN
That's too much trouble tho Reed, I was lookin to cram a 351 in my Mid, but the way gas is, I'll either try for fuel injection on it's 302, or an injected 300, that has room for a supercharger.
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#579601 - August 18th 2012 7:44 am Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
MrHoney Offline
veteran

Registered: September 30th 2011 12:11 pm
Posts: 2993
Loc: IRONDEQUOIT N.Y.
I have the 4.9 in my 150 and I am pretty happy with it, first time I ever had a ford six. It seems to be a great motor pretty good on mpg too. Mine is EFI.

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#579613 - August 18th 2012 12:02 pm Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
MrHoney Offline
veteran

Registered: September 30th 2011 12:11 pm
Posts: 2993
Loc: IRONDEQUOIT N.Y.
I must say though, I only have driven it 200 miles

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#580039 - August 21st 2012 12:00 pm Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
Reed Offline
carpal tunnel

Registered: August 27th 2001 12:00 pm
Posts: 8377
Loc: Fircrest, WA
I don't know. I haven't been happy with the way this 351 has run in a long time. I am beginning to suspect an internal mechanical problem. I need to do some diagnostics- mainly a compression and leakdown test to know for sure. Sometimes it will idle smooth, but most of the time it idles a bit rough. It has been running hot lately and has been getting really bad gas mileage (worse than usual).

I wouldn't minding swapping it to a 300. The 300 would be much easier to work on and an injected 300 mated to an AOD would be a reliable and economical combination.
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#580095 - August 21st 2012 5:08 pm Re: 84 ford econoline straight 6 to 351 swap,anyone done this here? ?? [Re: Vanmatic]
Uncle_Fester Offline

Festerus Vannimus

Registered: May 26th 2007 10:41 pm
Posts: 8951
Loc: On Route 66 in Bethany Oklahom...
Reed, check the plug wires and for a vacuume leak. I had a similar problem with the Astro , and it turned out to be a plug wire boot ( plug end) that had dried out and cracked letting spark go every where but where it was supposed to.
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