391
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
391 4V: 1964/78 500 and larger series trucks, but usually not found in F500/600's.
359 and 389 are 361's and 391's detuned for smog.
Butt-Head
Joined: Apr 2004
Posts: 9,462
Likes: 2,942
From: Reed Point, MT
Still wondering about the allure of the steel crank.
Back when I was in high school (more than 20 years ago) and figuring out how I wanted to rebuild the FE in my F100, I measured every part laying around the place and that included a 391 crankshaft. The forged steel crank out of a 391 weighs 71 lbs. while the cast crankshaft from a 352/360 or 390 weighs 56 lbs.
Machining costs not considered, I ended up with a nasty little 352 after that little experiment.
Back when I was in high school (more than 20 years ago) and figuring out how I wanted to rebuild the FE in my F100, I measured every part laying around the place and that included a 391 crankshaft. The forged steel crank out of a 391 weighs 71 lbs. while the cast crankshaft from a 352/360 or 390 weighs 56 lbs.
Machining costs not considered, I ended up with a nasty little 352 after that little experiment.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Still wondering about the allure of the steel crank.
Back when I was in high school (more than 20 years ago) and figuring out how I wanted to rebuild the FE in my F100, I measured every part laying around the place and that included a 391 crankshaft. The forged steel crank out of a 391 weighs 71 lbs. while the cast crankshaft from a 352/360 or 390 weighs 56 lbs.
Machining costs not considered, I ended up with a nasty little 352 after that little experiment.
Back when I was in high school (more than 20 years ago) and figuring out how I wanted to rebuild the FE in my F100, I measured every part laying around the place and that included a 391 crankshaft. The forged steel crank out of a 391 weighs 71 lbs. while the cast crankshaft from a 352/360 or 390 weighs 56 lbs.
Machining costs not considered, I ended up with a nasty little 352 after that little experiment.
Mountain Pass
Joined: Nov 2004
Posts: 140
Likes: 2
From: Monroe, WA
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
No FT engines were installed after 1978. Replaced in 1979 with 370 & 429.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Yes 330 medium duty used a standard 352/360 FE crank.
Never worked on 359/361 engines but they have the same stroke as the 330.
389 is a emissions detuned 391 that only came with the big snout steel FT crank, I've worked on a lot of these engines and have never seen one with a small snout FE crank.
Never worked on 359/361 engines but they have the same stroke as the 330.
389 is a emissions detuned 391 that only came with the big snout steel FT crank, I've worked on a lot of these engines and have never seen one with a small snout FE crank.
But this is "a sheep in wolf's clothing," because it uses the 360 crank, so what the IDIOTS at FoMoCo did, they renamed the M/D the H/D!!!
The original 1964/72 330 H/D then went bye-bye. This has been a FIASCO ever since.
See 6303 in pic.
C8TZ-6303-A is the 1968/72 360 crank used in 1968/72 330 M/D .. D0TZ-6303-C originally was the 330 H/D crank installed in 1970/72 F600's w/a C6.
D3TZ-6303-B is also the 1973/76 360 crank. D3TZ-6303-C is also the 1973/76 390 crank. Confusing, ain't it!
Mountain Pass
Joined: Nov 2004
Posts: 140
Likes: 2
From: Monroe, WA
Nope incorrect. Officially the FT ended as a production option at the end of the 1978 model year but the special U-haul fleet deals continued thru the 1979 model year. The pics I posted above are indeed of a 1979 model year 330XD. The owner has confirmed that the block was cast in early 1979. The parts books don't show actual history.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Nope incorrect. Officially the FT ended as a production option at the end of the 1978 model year but the special U-haul fleet deals continued thru the 1979 model year. The pics I posted above are indeed of a 1979 model year 330XD.
The owner has confirmed that the block was cast in early 1979.
The parts books don't show actual history.
The owner has confirmed that the block was cast in early 1979.
The parts books don't show actual history.FTE Stories
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Mountain Pass
Joined: Nov 2004
Posts: 140
Likes: 2
From: Monroe, WA
Mirror 105 block with double dot 9 date code. It was cast 4 weeks prior to the trucks scheduled build date. Mirror 105 blocks did not come out until 1973.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
That is determined by using the engineering number prefix. But if it's an FE/FT, it's not a 79 casting. Last year for them was 78 in the MD trucks.
Mountain Pass
Joined: Nov 2004
Posts: 140
Likes: 2
From: Monroe, WA
You are correct the '78 model year was the last year that FTs were offered for retail sale in HD/MD trucks. But the U-Haul fleet order was a special deal not a normal production order. The story I heard was that U-Haul liked the 330XD engine so much in '78 that they convinced Ford to put it in their big fleet order in '79 as well. I don't know if that is the real story or not but the pics I posted above were from a long time FE big block forum group member. He has talked about his '79 330XD U-Haul F-350 many times over the years. I'll see if I can find the pic that he took of his warranty plate.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
U-Haul F350's came with the 330 2V Medium Duty, and the parts catalog listing is 1973/77.
The 330XD is listed in the VIN engine codes for 1975/78 500 and larger series trucks, its code is D but there's no mention of it in the FT engine parts section, so it may have been a D.S.O. only.
The 330XD is listed in the VIN engine codes for 1975/78 500 and larger series trucks, its code is D but there's no mention of it in the FT engine parts section, so it may have been a D.S.O. only.
Freshman User
Joined: Nov 2004
Posts: 39
Likes: 1
From: Wyoming, Michigan
=
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
You are correct the '78 model year was the last year that FTs were offered for retail sale in HD/MD trucks. But the U-Haul fleet order was a special deal not a normal production order. The story I heard was that U-Haul liked the 330XD engine so much in '78 that they convinced Ford to put it in their big fleet order in '79 as well. I don't know if that is the real story or not but the pics I posted above were from a long time FE big block forum group member. He has talked about his '79 330XD U-Haul F-350 many times over the years. I'll see if I can find the pic that he took of his warranty plate.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
