[joshcorey56]

this may sound stupid but my older brothe asked me today what the difference is between two of the baddest motors made.all the parts anr interchangeable but what makes the cubic inches different. is the 429 a destroked 460 or is the 429 a shorter deck hieght?

 

[mudbogtom]

this may sound stupid but my older brothe asked me today what the difference is between two of the baddest motors made.all the parts anr interchangeable but what makes the cubic inches different. is the 429 a destroked 460 or is the 429 a shorter deck hieght?

Stroke is different, rods are the same, pistons are different. 78 and later are external balance, earlier are internal. EFI engines heads are not the same as carbed heads, so intake swaps aren't exactly bolt on... just a few of the differences. Some reading here will give you more detailed info. Deck height vary from 10.3 - 10.322, which is little difference, but needs to be mocked up and checked before any new parts are bought or installed.
Tom

 

[68xr7cat]

Just to add all 429 are internal balance. 1968 - 1978 460's are all internal balance. 1979 and up 460's are external balance.

In addition to the EFI heads having different intake and exhaust port locations, the standard passenger car heads and the CJ heads are different as well. I mention this as many people get burned on intake and exhuast manifolds that don't match the ports properly. Can get a bit confusing...

Steve

 

[TorinoStyle2]

429 and 460 are basically the same thing as far as the 'early' 68-78 engines go.
429 was made from 68 to 73, after that everything was a 460 only (except in large commercial trucks with had a "funky" 429 and 370 engines).

The difference in cubic inches comes from the crank stroke. A 429 has a 3.590" inch stroke, and a 460 has a 3.850" inch stroke...just a hair over a 1/4" inch extra stroke.

So the crankshafts are different between the two, and so are the pistons (same bore size, but wrist pin location is different between the two), the rods are the same.

In 1978, Ford changed the 460 to external balance (foolishly!!), and then in 1988(?) it became fuel injected and they revised the cylinder heads and intake manifold.

A carburated manifold will not bolt on to the late model EFI heads unless you do some machining "surgery" to the bolt pattern.

 

[rmcomprandy]

A carburated manifold will not bolt on to the late model EFI heads unless you do some machining "surgery" to the bolt pattern.

The bolt pattern between those two is the same ... the ports are in a different place.

 

[CarsByCarl]

Lets not forget the crank pilots....early cranks have the 1.850 and later are 1.375. This applies to both 429 and 460. Not sure when they quit using the 1.850....1970???

 

[Paul Kane]

this may sound stupid but my older brothe asked me today what the difference is between two of the baddest motors made. all the parts anr interchangeable but what makes the cubic inches different. is the 429 a destroked 460 or is the 429 a shorter deck hieght?

On any given year of production that both engines were manufactured, the 429 and 460 light duty passenger car engines are 100% identical except for the crankshaft (stroke) and pistons (pin location).

The other variations that took place over the years are noted in the above posts.

Paul

 

[jordhardy57]

I need headers for my 1987 f250 rwd with a 460, are they the same as 429 headers, any suggestions would help.

 

[The Mad Porter]

I need headers for my 1987 f250 rwd with a 460, are they the same as 429 headers, any suggestions would help.

Yes. Get headers for a BBF based on the chassis where the engine resides.







Scotty J. "AKA" The "Mad Porter"
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