Question about 250 in front of 1968 C4?

[Mustangaroo]

I think this has been discused, but my Question is about a 250 in front of 1968 C4? I am Thinking about pulling my 200 and installing a 250, I know the engine is taller and I will need custom motor mounts, but I was wondering if my 1968 C4 automatic will bolt up to the 250 short block with it's bell housing or do I need something else? Will 250's from 69-80 make this switch?

 

[CoupeBoy]

I think you are going to need
a 250 motor
a SBF C4 bellhousing and matching block plate (sandwiched between bell and block)
a 250 flexplate.

Also be careful of the two different styles of C4. One has a dipstick that screws right into the oilpan and the other has a dipstick that goes through part of the trans housing (press in with an o-ring)
Remove the stock 200 Bellhousing from the C4 and bolt up the SBF bell, and you should be ready to roll.

-ron

 

[Mustangaroo]

Thanks for the info, I was thinking this would be fairly easy except for the motor mounts and adjusting the height for hood for clearance. Anyone else out there who has done this please feel free to post and idea's or problems you had?

 

[ruckus68]

Hi Ben

I was wondering the same thing about putting a 250 in my 68 so i am glad you asked the question first.

Is it possible to make custom engine mounts to lower the engine or will that interfere with anything. I'd eventually like to get a T5 in it

Good Luck
John

 

[CoupeBoy]

The motor mount question was touched on a while back
http://fordsix.com/forum/viewtopic.php?p=176635

when I get a little free time I want to try making a jig to fit the '69 frame and motor mounts and then use that as a base for making some custom mounts for my '67.

Also in the above post it is mentioned that the66mustang (harrie) sells motor mounts that allow 1/2" drop and I thought he was going to put in a 1/2" setback to allow fitment of the 250 using 200 frame mounts.

-ron

 

[MustangSix]

Custom motor mounts could easily be made with 3" angle iron (and a lot of cutting, drilling and filing). But if you look at the frame mount, that's all it really is. You have to be careful not to drop it so low that the pan hits the steering or crossbrace.

 

[Mustangaroo]

My plan was to buy new 250 mounts and have them welded lower to the chassis. I've decided I don't like or need a high reving engine above 5,000 rpm, so my plans are to build a low compression 250, put my Aussie head on it and add my new 264/674 cam from FSP and turbo (not over 8lbs psi) it! I like the supercharger but the whinnnne is getting to my wife SO maybe I'll ebay the Supercharger sometime before the end of the year with all the gear to mount to a 200 six

 

[MustangSix]

...my plans are to build a low compression 250, put my Aussie head on it and add my new 264/674 cam from FSP and turbo (not over 8lbs psi) it!

That would be an easy way to get to 250-270 hp with a ton of torque.

 

[Does10s]

Hey Ben,
For what it's worth....our installation of a 250 into a '63 Falcon was EASY! Didn't have to modify the motor mounts at all!
And CoupeBoy is correct. The bellhousing will have to be swapped with a standard SBF one. Just make sure when you buy your flexplate you get one that is matched with the bellhousing. A 157 tooth bell with a 157 tooth flexplate. Or a 164 with a 164. You get the idea. Also the flexplate for a 250 is the same for a SBF except for the neutral (zero) balance.
We're using a TCI flexplate.
Another little trick that we're having to use. Buy new ARP flexplate bolts to attach it to the crank. And GLUE THEM IN! By that I mean they will loosen up over time. I used Loctite on the treads and JB Weld on the heads after they were torqued to hold them in place. So far so good. We've wasted 2 flexplates due to the bolts loosing up!
This "problem" may just be inherent to our motor but it definately sucks having to pull the tranny 3 times just to fix the loose flexplate!
Later,
Will