swap to a bigger motor
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Elder User
Joined: Aug 2006
Posts: 813
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From: foristell, missouri
swap to a bigger motor
i will be getting a 429 and 460 cheap. i would like to put the 429 in my truck. will 460 parts mount up to the 429, ie bell housing and motor mounts and stands? also what else would i need to swap this over, i have a 351w in it now. i was told that the 429 and 460 are basically the same block, is this true? my truck is a 90 f250 4x4 5-speed. thanks yall nik
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
The 429 is an FE motor, so you will need a tranny with an FE bell on it. You will also have to convert to a carb, so you'd need to get your fuel pressure down to about 5 to 7 psi. Not sure about engine mounts, but since the motor was never offered in your truck, you may or may not be able to easily find the parts you need. Fabbing them is also an option if you have the skills and tools. This would be a fairly complicated swap. There are likely going to be a lot of minor issues that could add up to a lot of time and effort.
The 460 would be a much better fit. Since it was offered from the factory, you can go to the junkyard to find all the parts. You can also keep the EFI system, which is a plus in my book.
The 460 would be a much better fit. Since it was offered from the factory, you can go to the junkyard to find all the parts. You can also keep the EFI system, which is a plus in my book.
Postmaster
Joined: Oct 2008
Posts: 3,026
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From: Renton, WA
Yes the 429 and 460 stuff will swap but is totaly different from your 351. There are conversion motor mounts you can buy but you will need a diiferent transmission the bellhousing is different.
Andym, the 428 is an FE not the 429, 429 is a 385 series just like the 460 they are externally the same.
Andym, the 428 is an FE not the 429, 429 is a 385 series just like the 460 they are externally the same.
Post Fiend
Joined: Aug 2008
Posts: 6,751
Likes: 3
From: Sin City
The 429 is an FE motor, so you will need a tranny with an FE bell on it. You will also have to convert to a carb, so you'd need to get your fuel pressure down to about 5 to 7 psi. Not sure about engine mounts, but since the motor was never offered in your truck, you may or may not be able to easily find the parts you need. Fabbing them is also an option if you have the skills and tools. This would be a fairly complicated swap. There are likely going to be a lot of minor issues that could add up to a lot of time and effort.
The 460 would be a much better fit. Since it was offered from the factory, you can go to the junkyard to find all the parts. You can also keep the EFI system, which is a plus in my book.
The 460 would be a much better fit. Since it was offered from the factory, you can go to the junkyard to find all the parts. You can also keep the EFI system, which is a plus in my book.
Thread Starter
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Elder User
Joined: Aug 2006
Posts: 813
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From: foristell, missouri
I guess on my tranny the bell housing is not removable? I'm not too concerned with the complexity since it's more for............ Ummm fun and power than nesecity. If a have to have a completely new tranny what one would I be looking for, I want a 4 or 5 speed?
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Elder User
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From: foristell, missouri
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Thread Starter
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Elder User
Joined: Aug 2006
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From: foristell, missouri
if i decide to go carbureted, what would i need that i dont have already? assuming the motor is already carbureted. as i know little about carbureted and quite a bit about EFI, all help is welcome.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
According to your "new to.." post over in the 385 forum it's a '94 engine, so it came with EFI.
You could swap to a carb but you'd need an adapter plate made by Price Motorsports.
You still would need an exhaust for the efi (post '87) engine, but no need for the O2 sensors and stuff.
I've posted to a few threads about this.....
You could swap to a carb but you'd need an adapter plate made by Price Motorsports.
You still would need an exhaust for the efi (post '87) engine, but no need for the O2 sensors and stuff.
I've posted to a few threads about this.....
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
The 429's are internal balance so you may have issues with finding a properly balanced flywheel that will mate with a clutch for the ZF. (everything post '78 is external)
I'm not sure about the 429 crank pilot shaft bushing-ZF input shaft.
You need exhaust manifolds from a 4X4 for clearance putting a car motor in a truck.
But motor mounts for a 460 will work fine.
There's a zillion threads about this stuff.
Monsterbaby has forgotten more than I'll ever know.....
