I have a friend on another forum wanting to know if on his 66 mustang if 200 motor mounts would work for his 250. I always though the 250 and 300 shared the same block and the 172-200 was different. also if anyone knows where he can find 250 motor mounts please forward me the info thanks.
Studpid question you probably all know
- Thread starter fast3006
- Start date
The 250, 200, 170, and 144 are all small block sixes of the same engine design family. So yes his mounts will fit though they need to be modded tell him to get the Falcon Performance book it covers the 250 swap. The 300 and 240 are the big sixes and can also fit but will be much more work. Good luck 
opsie: Guess that I misunderstood your question. So he looking for the 250 rubber insulators not adapting to the 200 frame mounts? Those would be different depending on model car he's working on etc. the 250 is 1.6 inches taller then the other small sixes so the mounts are made a little different in height from the 200's. You might have him try at a NAPA auto parts in the past my locale dealer and was also a parts distributor warehouse they had sources for the obsolete parts however not all of the NAPA's stores are created equal or have the knowledge. Other then that he will need to search the obsolete Ford parts companies. One of our members "CoupeBoy" is designing some 250 mounts but that will be some time yet before they are available. Good luck 
Pictures be thy friend..
If he already has a working 250 in his engine bay, he had to have used a stock type rubber mount.
90% of all rubber motor mounts are reproduced and fairly reasonable in price.
The other 10% include things like the 1969/1970 mustang 250 mount; NOBODY makes replacements for those..
And bubba is correct. I have been working on creating motor mounts for guys who want to convert from a 144/170/200 to a 250. I will be borrowing a 1966 Mustang soon to try them out and document them, but I have two other sets of prototypes that I am willing to send to a forum member for the price of shipping with the stipulation that I need feedback in addition to installation pictures.
The FordSix thread on how I created them
Small Six Motor Mount Dimensions
A photobucket gallery full pictures
Small Six Conversion Mounts 200 to 250
A set of brackets one without the bushing tube, and a complete setup for one side.
And back to back with a stock mount.
If he already has a working 250 in his engine bay, he had to have used a stock type rubber mount.
90% of all rubber motor mounts are reproduced and fairly reasonable in price.
The other 10% include things like the 1969/1970 mustang 250 mount; NOBODY makes replacements for those..
And bubba is correct. I have been working on creating motor mounts for guys who want to convert from a 144/170/200 to a 250. I will be borrowing a 1966 Mustang soon to try them out and document them, but I have two other sets of prototypes that I am willing to send to a forum member for the price of shipping with the stipulation that I need feedback in addition to installation pictures.
The FordSix thread on how I created them
Small Six Motor Mount Dimensions
A photobucket gallery full pictures
Small Six Conversion Mounts 200 to 250
A set of brackets one without the bushing tube, and a complete setup for one side.
And back to back with a stock mount.
thanks guys he had it figured out. they told him 250 for a rebuild of his mounts you believe that!! each!! he has to find them from a Australian supplier for his 66 apparently that motor was more common down under. you should check out the XR6 the turbo inline they put in late model Falcons. hear is one in in a 65 stang running 8's with full interior and street condition.
http://www.youtube.com/watch?v=bDW-wHqRrJ8
http://www.youtube.com/watch?v=bDW-wHqRrJ8
I'm afraid your friend is getting fed bad information.
If he has the 1969/1970 inline 250 mounts, then he is over a barrel for rebuild fees as NOBODY offers them for replacement and the only way to get them is good used ones. (or rebuild)
The Austrailian (Oz) 250 motor mounts are not going to work unless he has somehow managed to acquire or build a special frame side mount.
The link I provided above has pictures of standard 200 mounts, 1969 250 mounts, and a set of Oz 250 motor mounts. Which look like this.
If he has the 1969/1970 inline 250 mounts, then he is over a barrel for rebuild fees as NOBODY offers them for replacement and the only way to get them is good used ones. (or rebuild)
The Austrailian (Oz) 250 motor mounts are not going to work unless he has somehow managed to acquire or build a special frame side mount.
The link I provided above has pictures of standard 200 mounts, 1969 250 mounts, and a set of Oz 250 motor mounts. Which look like this.
The Aussie I6 never, ever moved to 69-70 center percussion engine mounts that the Big I6 uses as well as the Fox I6's and all X-shells.
The 250 log, 2V and X-flow in Cortina, Falcon or Bronco, it always used the rearward isolator engine mount.
The Aussie i6 has the engine mounts with an extra gusset. They allow the stock V8 X-shell cross member with its pads to be used.
Fitting a 300 or big US 250, or Aussie 250 with these means you just have to bend the isolator mount tangs back to fit a Fox body, or just use the V8 X-shell cross-member to fit the Falcon/Mustang
The US small six engine mounts were generally center percussion, forward mount,from the first 1963 200 till the last 1983 Fox LTD/Fairmont.
When fitting the Aussie six to the Fox body, just use the Aussie engine mounts, bend back the isolator tangs, and they line up with the two holes the I6 K member has.
The 250 log, 2V and X-flow in Cortina, Falcon or Bronco, it always used the rearward isolator engine mount.
The Aussie i6 has the engine mounts with an extra gusset. They allow the stock V8 X-shell cross member with its pads to be used.
Fitting a 300 or big US 250, or Aussie 250 with these means you just have to bend the isolator mount tangs back to fit a Fox body, or just use the V8 X-shell cross-member to fit the Falcon/Mustang
The US small six engine mounts were generally center percussion, forward mount,from the first 1963 200 till the last 1983 Fox LTD/Fairmont.
When fitting the Aussie six to the Fox body, just use the Aussie engine mounts, bend back the isolator tangs, and they line up with the two holes the I6 K member has.
