difference between 91 and 95 efi 460

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Jun 21, 2025 | 10:37 AM

#16

cougrrcj

Laughing Gas

Joined: Jul 2009

Posts: 1,032

Likes: 424

From: NE Ohio

Funny you should mention building an engine ahead of time. I did a rebuild of my '95 7.5L two years ago. I used Keith Black 137 hyper flat-top pistons (1.772 compression height), and combined with the F3TE 91.5cc chambers yielded ~9.5:1 compression with the stock 10.322 deck height block.. I also used the Comp Cams 34-255-4 computer-compatible cam (no longer available) and mid-length headers similar to Hedman 89510. Note that I DID do the complete '96-97 CA-spec factory Mass-air conversion. THAT'S how I know what all is needed to convert SD to MAF/ EEC-V, LOL! My full build thread here: https://www.ford-trucks.com/forums/1...onversion.html

Nov 12, 2025 | 08:05 PM

#17

Sinntax

Trailering

Joined: Jun 2016

Posts: 17

Likes: 0

From: Oregon

Zombie Thread Activate,

New Mustang Project interrupted truck, back to truck again with a change up, now I'm thinking about just putting the whole 95' Cab on the 91'.... both are 460's and both Automatics... 91 is 4x4 though. Any under hood wiring night mares come to mind? ECU compatibilities with 91' 460 or speedo or gauge stuff?

Nov 13, 2025 | 05:58 AM

#18

manicmechanic007

Hotshot

Joined: Jul 2020

Posts: 10,606

Likes: 2,680

From: Near Salt Lake City

Quote:

Originally Posted by House Husband

There is another choice of ECM that should work. 1994-1997 F53 (motorhome). EEC-IV (OBD-I), AIR, no cat, 245 HP.

Richard

That is what I was thinking
The software changes were as much a help as the heads and motor parts
The 95's just have better drivability
The E4OD trans map constantly improved too IMO