through 78.
391ft motor needed
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
391 4V FT: 1966/69 B/C/F/N/NT/T500/750 // 1970/78 B/C/F/L/LN500/750.
1964/78 like trucks were also available with FT: 330 2V Medium Duty - 330 2V Heavy Duty - 361 2V - 361 4V (1974/78).
All these FT engines look identical / The 4th digit of the VIN is the engine code. F = 391 4V (1966/78).
'Course, who knows if this engine is still in place today?
1964/78 like trucks were also available with FT: 330 2V Medium Duty - 330 2V Heavy Duty - 361 2V - 361 4V (1974/78).
All these FT engines look identical / The 4th digit of the VIN is the engine code. F = 391 4V (1966/78).
'Course, who knows if this engine is still in place today?
Thread Starter
|
Posting Guru
Joined: Jan 2013
Posts: 1,694
Likes: 5
From: Cary Il
391 4V FT: 1966/69 B/C/F/N/NT/T500/750 // 1970/78 B/C/F/L/LN500/750.
1964/78 like trucks were also available with FT: 330 2V Medium Duty - 330 2V Heavy Duty - 361 2V - 361 4V (1974/78).
All these FT engines look identical / The 4th digit of the VIN is the engine code. F = 391 4V (1966/78).
'Course, who knows if this engine is still in place today?
1964/78 like trucks were also available with FT: 330 2V Medium Duty - 330 2V Heavy Duty - 361 2V - 361 4V (1974/78).
All these FT engines look identical / The 4th digit of the VIN is the engine code. F = 391 4V (1966/78).
'Course, who knows if this engine is still in place today?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
It's not a C600 and I assume you only want the Warranty Number (VIN) decoded.
C75 = C750 Tilt Cab.
K = 361 2V FT engine (K used 1964/65 only).
U = Louisville KY Assembly Plant.
645859 = 1965, assembled January 1965.
C75 = C750 Tilt Cab.
K = 361 2V FT engine (K used 1964/65 only).
U = Louisville KY Assembly Plant.
645859 = 1965, assembled January 1965.
Thread Starter
|
Posting Guru
Joined: Jan 2013
Posts: 1,694
Likes: 5
From: Cary Il
Thank you number dummy. Would this 361 ft motor have harden valves? The difference between a 361 ft and the 391ft is the crank?
Hp and torque of both?
Hp and torque of both?
Trending Topics
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
361 crank same as 391, but while the bore is the same (4.05"), the 361 pistons are different than 391.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Logistics Pro
Joined: May 2008
Posts: 3,670
Likes: 369
From: PHX AZ
361 Crank is 3.5 Stroke Bore is 4..05
391 crank is 3.78 Stroke (same as 390 & 427) 391 Bore same as 390 4.052
Per my Ford Book the 330, 361 & 391 have Exhaust seat inserts.
I remember working on many at my first job which was a machine shop (nearly 40yrs ago)
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
I can only go by what the parts catalog lists inre to pistons.
Super Moderator
Joined: Apr 2004
Posts: 34,475
Likes: 2,800
360 to 390, the crank, rods and pistons differ.
Does the 361 have longer rods than the 391, as a 360 does compared to a 390?
It could be just crank and pistons that differ 361 to 391. You'd have to find the compression heights for the pistons and do the math.
Does the 361 have longer rods than the 391, as a 360 does compared to a 390?
It could be just crank and pistons that differ 361 to 391. You'd have to find the compression heights for the pistons and do the math.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
330 2V H/D, 361 & 391 FT's use the same rods as 390 FE.
However, the 330 2V H/D, 361 & 391 rods are somewhat year specific. 1964/65 or 1966/70 or 1971/78.
330 2V H/D & 361 use the same crankshaft, 391 crankshaft is 391 only.
Logistics Pro
Joined: May 2008
Posts: 3,670
Likes: 369
From: PHX AZ
352 rod is 6.538-6.542
very low comp spec on 361-391 engines
The combustion chambers on a 361-391 average 2 cc's larger than the 352
Logistics Pro
Joined: May 2008
Posts: 3,670
Likes: 369
From: PHX AZ
on 361 & 391 Starting 1966
Thread Starter
|
Posting Guru
Joined: Jan 2013
Posts: 1,694
Likes: 5
From: Cary Il
I found a motor in a one ton ford truck the air cleaner said 39* the last number was scratched so I could not make out the number.
I am thinking it is a 390 fe motor?
I am trading him some Chevy stuff for it .
I will have the block numbers tomorrow
Will a 390 fe work as will in my truck as a 391ft?
I am putting it in this!
I am thinking it is a 390 fe motor?
I am trading him some Chevy stuff for it .
I will have the block numbers tomorrow
Will a 390 fe work as will in my truck as a 391ft?
I am putting it in this!