460 to 6.9

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Nov 6, 2012 | 10:05 PM

1989_f250

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460 to 6.9

i have a 89 f250 with a 460 and plan on swapping out with a 6.9 and 4speed, the question i have is will it bolt right up in the 460 mount location or will i have to move the crossmember, any info would be great

Nov 6, 2012 | 11:09 PM

typefour

Laughing Gas

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From: Newberg Oregon

You will need diesel frame and engine mounts, otherwise it fits right in.

Nov 7, 2012 | 03:00 AM

BikeMaker

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From: Albany, Oregon

On mine, the 460 frame mounts were riveted on. Cut them off with a torch, and bolted up the diesel frame mounts off of the donor truck.
And the frame mounts that I am referring to are what go between the engine cross member and the rubber isolated motor mounts. Crossmembers are all in the same location, regardless of engine.

Nov 7, 2012 | 01:39 PM

1989_f250

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i dont have a donor truck just the engine and tranny, what are the differences between the frame mounts?

Nov 12, 2012 | 07:51 AM

ke5adb

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From: Kremlin, Ok

If it was me, I'd keep the 460. Properly tuned, I've gotten 12-13mpg out of one in a '86 crewcab with 4-speed and 4.11 rear. The 6.9 isn't worth swapping IMHO.

Nov 12, 2012 | 04:58 PM

1989_f250

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the 460 is no longer efi and built to pull in a street class have no more time to pull it so swapping it out with something that doesnt get 6 mpg

Nov 12, 2012 | 06:12 PM

whalebus2112

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Quote:

Originally Posted by ke5adb

If it was me, I'd keep the 460. Properly tuned, I've gotten 12-13mpg out of one in a '86 crewcab with 4-speed and 4.11 rear. The 6.9 isn't worth swapping IMHO.

Yea maybe if your empty and never go over 45 mph down a hill. I have owned several 460s and they all get single digits unless youy are parked.

I am going to go this route also. I have a strong low milage 6.9 in my extra cab but I want a CCab so I plan on finding a nice gas cc because poeple are giving these gas pigs away now.