Which engine is which
Thread Starter
|
New User
Joined: Apr 2000
Posts: 18
Likes: 0
Which engine is which
I have a 1973 Ford B700 school bus with a V8 engine. I was told it might be a 330 cu in. It has a partial sticker on the front of the drivers side valve cover . All I can see on the sticker is a line that says "330 360 390". It has not run for 10 years and is all greased up. Can anyone suggest the easiest way to determine what size the engine really is. The plugs all angle to the center, the oil filter hangs vertical, the valve covers say "Powered by Ford" and it has a 2 bll Holley on top. None of the parts books I have list a 330 engine but then again they only list up to 1 1/2 ton trucks. Could this be an infamous FT-330 truck engine. Thanks for your help.
Senior User
Joined: Jul 1999
Posts: 154
Likes: 0
From: Relocated to San Diego CA
Which engine is which
If it is a f700, It's most likly a 390. They are very easy to reconize. Look at the valve covers, do they cover part of the intake manifold? If so thats a 390. I've got one.
Thread Starter
|
New User
Joined: Apr 2000
Posts: 18
Likes: 0
Which engine is which
Chenders and BBT,
I did a little degreasing on the engine this weekend. The sticker on the valve cover is an emissions specification sticker and the line on it says "330 361 391" and not "330 360 390". I can not see an exhaust crossover on the intake from an external view and the valve covers do not cover part of the intake manifold.
I appreciate your input but are there any other tell tale ways to guage the engine size.
Come on motorheads, help this old boy out.
BigMac
I did a little degreasing on the engine this weekend. The sticker on the valve cover is an emissions specification sticker and the line on it says "330 361 391" and not "330 360 390". I can not see an exhaust crossover on the intake from an external view and the valve covers do not cover part of the intake manifold.
I appreciate your input but are there any other tell tale ways to guage the engine size.
Come on motorheads, help this old boy out.
BigMac
Senior User
Joined: Jul 1999
Posts: 472
Likes: 1
From: USA
Which engine is which
BigMac, I've worked on several FE and FT engines. Compared to FE engines (352, 360, 390, 427, 428), the FT (330 family, 361, 391) engines have different cylinder heads and exhaust manifolds (extra bolts used to prevent warpage in extreme truck duty) as well as a different water pump. The timing cover is different as well, as it is also the front engine mount. The rear engine mounts are cast "ears" on the bellhousing. Unfortunately, nearly all of these engines used the same block casting (it has "352" cast into it inside the bellhousing area), the only way to determine engine size is to measure the crankshaft stroke. Another possibility would be to get a part number off of the crankshaft, but I don't have the part numbers for the various cranks used. Sometimes the aircleaners had the engine size on them (assuming it wasn't changed). My recommendation is to drop the oil pan and measure the piston stroke. That way you will be 100% sure. Good luck,
Art
Art
Thread Starter
|
New User
Joined: Apr 2000
Posts: 18
Likes: 0
Which engine is which
Art,
Thanks for the input. If I measure the stroke to determine the cubic inches, what would the measurements be for the various size engines. I have no manuals to guide me.
BigMac
Thanks for the input. If I measure the stroke to determine the cubic inches, what would the measurements be for the various size engines. I have no manuals to guide me.
BigMac
Elder User
Joined: Aug 1999
Posts: 910
Likes: 0
Which engine is which
Can you post the 5th digit of your VIN? I have listings for what came in the truck originally as specified in the VIN.
Bore/Stroke:
330MD,330HD: 3.875/3.50"
361: 4.05/3.50"
391: 4.05/3.79"
I have casting numbers for FT cranks. It appears from looking at these, that a 73 330 would have a cast iron crank, and 73 361,391 all have forged steel cranks.
I also have engine block casting numbers for FT blocks. But this seems of limited value without knowing the bore size. As for example, D3TE-1 appears on both the 330 list, and the 361/391 list. Does the block have a mirror image 105 cast into the front driverside below the head? Most all FE and FT blocks have a 352 cast there, the heavier 361/391 blocks have the mirrored 105. Seeing the 105 would eliminate the 330 and then you could measure stroke w/ the dowel method to differentiate between 361/391. Post the VIN to find out what the original motor is suppose to be. Good Luck
BBT
Bore/Stroke:
330MD,330HD: 3.875/3.50"
361: 4.05/3.50"
391: 4.05/3.79"
I have casting numbers for FT cranks. It appears from looking at these, that a 73 330 would have a cast iron crank, and 73 361,391 all have forged steel cranks.
I also have engine block casting numbers for FT blocks. But this seems of limited value without knowing the bore size. As for example, D3TE-1 appears on both the 330 list, and the 361/391 list. Does the block have a mirror image 105 cast into the front driverside below the head? Most all FE and FT blocks have a 352 cast there, the heavier 361/391 blocks have the mirrored 105. Seeing the 105 would eliminate the 330 and then you could measure stroke w/ the dowel method to differentiate between 361/391. Post the VIN to find out what the original motor is suppose to be. Good Luck
BBT
Trending Topics
Thread Starter
|
New User
Joined: Apr 2000
Posts: 18
Likes: 0
Which engine is which
BBT,
Can you post what the different 5th VIN position definitions are. It would be a couple of days before I can get that back to you. If you can post them here today, this will be a done deal.
Thanks for your help,
BigMac
Can you post what the different 5th VIN position definitions are. It would be a couple of days before I can get that back to you. If you can post them here today, this will be a done deal.
Thanks for your help,
BigMac
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Elder User
Joined: Aug 1999
Posts: 910
Likes: 0
Which engine is which
C 330 2v medium duty
D 330 2v Heavy Duty
E 361 2v
F 391 4v
U 330 2v Propane HD
W 361 2v Propane
X 391 4v Propane
3 330 2v Low Compression
4 330 2v Low Compression
5 361 2v Low Compression
The chart I got this of off says 65-78 trucks use 4th digit. The cars 5th digit. I got this out of Steve Christ's book about rebuilding BigBlock Fords (FE&FT engines).
It appears that a 4v manifold would clue you to 391. Since FT manifolds are not interchangible w/ FE manifolds, and aftermarket manifolds are probably non-existent for FT's, I'd think that you could be pretty certain of a 391. As for 330 vs 361, unless you get inside and get a crank casting # or can measure the bore, you might have a tough time knowing for sure.
BBT
D 330 2v Heavy Duty
E 361 2v
F 391 4v
U 330 2v Propane HD
W 361 2v Propane
X 391 4v Propane
3 330 2v Low Compression
4 330 2v Low Compression
5 361 2v Low Compression
The chart I got this of off says 65-78 trucks use 4th digit. The cars 5th digit. I got this out of Steve Christ's book about rebuilding BigBlock Fords (FE&FT engines).
It appears that a 4v manifold would clue you to 391. Since FT manifolds are not interchangible w/ FE manifolds, and aftermarket manifolds are probably non-existent for FT's, I'd think that you could be pretty certain of a 391. As for 330 vs 361, unless you get inside and get a crank casting # or can measure the bore, you might have a tough time knowing for sure.
BBT
Thread
Thread Starter
Forum
Replies
Last Post
tylstruck
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
52
Jul 7, 2024 03:40 AM
ShockFox395
1967 - 1972 F-100 & Larger F-Series Trucks
4
Oct 27, 2016 04:15 PM
blisstruck
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
5
Feb 22, 2015 11:37 AM
krewat
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
8
Nov 28, 2007 04:21 PM