360/390 engine swap
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Joined: Jun 1999
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360/390 engine swap
I have found a 1966 f250 with a 390/automatic trans, 2-wheel drive, for sale at a good price. I would like buy the truck and use the 390 to repalace the 360 in my 1975 f100/4-speed 4x4. If i understand the other post i have read this shouldnt be a problem. Just want to make sure before I buy it. Are the motor mounts the same ? What problems might i encounter because of the different transmissions ? and will make any difference because its coming out of a 2-wheel drive ?
Thanks for tolerating this novice question.
Thanks for tolerating this novice question.
Freshman User
Joined: May 2001
Posts: 34
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360/390 engine swap
This should be a direct swap. Are you keeping the 4-spd? If so you will have to keep the flywheel/clutch out of your truck. However, this is no big deal.
I would recommend keeping the acc. brackets off your current motor. And possibly the emissions stuff (if you still have it all attached). Becouse your truck is a '75, it probably isn't required to take smog tests. This would simplify things considerably. If you do, and you want to keep it smog legal, you maybe would need to swap the intake and possible the cylinder heads (for the EGR crossover). The '66 motor might not have these passages on it. I am not that familar with the smog components on the FE
The 360 and the 390 use the same block (same bore). The crank is what seperates these two motors.
MattN
70 F100 2wd
302 3-spd man
Sweetest little blue truck I own!!!
I would recommend keeping the acc. brackets off your current motor. And possibly the emissions stuff (if you still have it all attached). Becouse your truck is a '75, it probably isn't required to take smog tests. This would simplify things considerably. If you do, and you want to keep it smog legal, you maybe would need to swap the intake and possible the cylinder heads (for the EGR crossover). The '66 motor might not have these passages on it. I am not that familar with the smog components on the FE
The 360 and the 390 use the same block (same bore). The crank is what seperates these two motors.
MattN
70 F100 2wd
302 3-spd man
Sweetest little blue truck I own!!!
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
360/390 engine swap
Doug, Just put a 390 crank and piston set in your 360 and you will have a 390, with out other parts to deal with.
John
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66F100s Rule
In the cool still quite of night you can hear chevies rusting away.
Laughing Gas
Joined: Oct 1999
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From: yes
360/390 engine swap
You will need to swap the oil pan, the oil pump pickup add a pilot bearing to the back of the crank, and swap the flywheel onto where the flexplate was. The reason for swapping the oil pan and pickup tube that bolts onto the oil pump is because the 4x4 oil pans are deep in the back and the 2 wheel drive ones are deep in the front of the engine, the reason the 4x4 are deep in back is to clear the suspension same with the 2 wheel drive and why it's deep in front, you'll need the pilot bushing for going into the crankshaft for the front shaft of the transmission. When swapping the oil pump pickup tube you might want to step up to a high volume oil pump, or at least just get a new oil pump and oil pump driveshaft because this will be the easiest time to do it while the engine is outside of the vehicle. Total cost about $45.
Cargo Master
Joined: Jul 2000
Posts: 2,281
Likes: 18
From: Northern California
360/390 engine swap
I'd make sure the 390 is really a 390. I was told once that it was a 390 only to find it was a 360 and you can't really tell from the outside. I think the crank of the 390 has a square notch and the 360 has a round notch at the flywheel end. I'd also check the overall condition and compression because it might be better to convert your 360 to a 390.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
360/390 engine swap
Cal & Karl in the 65, he will need to make sure it isn't a 352. If it is already in a truck, I don't think he would have to make those changes that you suggested, right? ;-)
John
jowilker
[link:www.ford-trucks.net/users/jowilker|Club FTE since 01 01] My FTE Page
[link:www.ford-trucks.net/users/jowilker/NCFTE.html|NC Truck Owners] NC Ford Truck owners group
66F100s Rule
In the cool still quite of night you can hear chevies rusting away.
John
jowilker
[link:www.ford-trucks.net/users/jowilker|Club FTE since 01 01] My FTE Page
[link:www.ford-trucks.net/users/jowilker/NCFTE.html|NC Truck Owners] NC Ford Truck owners group
66F100s Rule
In the cool still quite of night you can hear chevies rusting away.
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LITTLE ENGINE SWAP HELP IF YOU WILL FELLAS
I have a '75 f250 highboy A/T full time 4wd running a 360 block and a holley 1850 600cfm carb. Now me and my buddy have rebuilt and tried to dial the carb in several times but it just wont dial in right. We have talked about the possibility of dropping a 6.9l with manual tranny. I am aware of having to fab new linkage and motor mounts. I am curious first if it will be worth the possible frustration and then if I will need to change my T-case? Turbo or not and what if it even matters should I be year specific? Would it make any benefit to the project to consider a 1st or 2nd year 7.3l turbo or not? I am certain there will be many finite parts to this process I am most likely overlooking so any additional knowledge to help me would be most appreciated. Thanks for the site and helping this new member.
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From: NorCal
I have found a 1966 f250 with a 390/automatic trans, 2-wheel drive, for sale at a good price. I would like buy the truck and use the 390 to repalace the 360 in my 1975 f100/4-speed 4x4. If i understand the other post i have read this shouldnt be a problem. Just want to make sure before I buy it. Are the motor mounts the same ? What problems might i encounter because of the different transmissions ? and will make any difference because its coming out of a 2-wheel drive ?
Doug, Just put a 390 crank and piston set in your 360 and you will have a 390, with out other parts to deal with.
John
jowilker
John
jowilker
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