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Old 01-12-2005, 08:04 AM
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Unhappy Bigger Engine For 68 Falcon

I have just finished rebuilding the body of my 68 Falcon. I have noticed it is underpowered on the hills here. I have a spare 289 V8 engine. Would appreciate any comments, specific procedures, parts needed, etc. to make a change out. My Falcon currently has a Straight (200ci) 6 Cylinder with a C4 transmission.


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Old 01-12-2005, 09:21 AM
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engine swap

Thats a pretty straight up swap. You will want to be sure you have the rigth bellhousing and flex plate for your 289. You didnt indicate the year of the block, so it could use either a 5 or 6 bolt bellhousing, depending on year of production. They switched them from 5 to 6 sometime during 65.
You will also need the SBF engine mounts. Not too sure about the radiator, whether it will keep you cool or not, try it and see.
Other than the things mentioned, its a drop in job.

You can free up a few horses by going with an electric fan for the radiator. That will also negate needing to run down fan spacers, fairing, etc for use with your 289.

Im not sure which version of the C-4 you have, whether the bellhousing bolts to a flange on the case, or to the front of the pump housing. If yours has the flange, you can use either type of bellhousing with it, but the flange bellhousing wont work with the non flange tranny.
You can use any 164 tooth flex plate from a 221-302 up through 82, which were all 28 oz offweight, and the flex plate from any 351 W or Cleveland, as they used that same flywheel.
During the 70's they also made a 157 tooth flywheel and a smaller bellhousing for use in cars like the Mustang II.
If you plan to do some stuff like headers, when you have the engine out will be a good time to drop them in, and wire them back out of the way.
A good update would be to put a petronix electronic ignition kit in your distributor as well. They are inexpensive, and well worth the effort. You can get them from either Summit or Jegs.

You might as well swap out the transmission as well, as my parts interchange book shows you will need a different torque converter, and the tailshaft housings are different as well.

The alternative is to oats up your 200 I-6. You can find some goodies for them with Clifford Performance.

That 200 is very responsive to hop up tricks, and would make for something a little different than what the guy down the street has.

Last edited by Max Keith; 01-12-2005 at 09:15 AM.
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Old 01-12-2005, 11:13 AM
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I did a six cylinder to V8 swap on my 66 Comet. I had to get the lower V8 motor mounts from a V8 car. I bought new upper V8 motor mounts from Checker Auto Parts. I had to buy a bigger radiator, V8 radiators have bigger outlets for the hoses plus the V8 radiator outlets are in different spot on the radiator. The 6 cylinder wiring was too short for use with a V8. I snagged a harness off a V8 junkyard car. I also changed my car from a auto to a 4 speed manual trans so I won't go into details here. Your bell-housing is different on your 6 cylinder engine, you should be able to find a V8 C4 bell-housing in the junkyard or on Ebay. Make sure it matches the back of your 289 it can be either 5 bolt or 6 bolt pattern since it is a 289. Your 6 cylinder throttle linkage is different than a V8 engine car, don't bother with finding mechanical linkage, get a cable set up off a 70's V8 Maverick, Granada, Monarch, Torino etc... almost any 70's V8 Ford car cable linkage will work. Your 6 cylinder front coil springs will be a little weak for a V8 but they will work, my car sat about 2 inches lower in the front with a V8 and 6 cylinder coils. I ran it that way for a year and had no problems, but when I rebuilt the front end I put in V8 coils. You should have a 8" rear-end if not plan on changing it, the wimpy 7.5" will not hold up to a V8. You can probably get away with your four lug brakes, but if you upgrade the rear-end you might as well find five lug V8 spindles and brakes. Also your fuel line comes into the engine compartment in the wrong place, you will have to change this too. I hope this helps you some and I hope I didn't leave anything out.
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Old 10-07-2007, 03:34 PM
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If your 289 needs a rebuild, have the head modified with hard valve seats or do an exchange from a head rebuilder with hard valve seats. No unleaded gas worries then....Doug
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Old 10-07-2007, 07:08 PM
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How about just rebuilding the 6cyl w/ a Turbocharger? I have a '67 and that's what I did.

Cost me about $2,500 to do the engine w/o turbo. but I have roller rockers, dual roller timing chain ect... my motor, altho not running w/ turbo yet ( still putting stuff togther now ) should make, in the 300 Hp range

this is the Motor w/o the turbo in place. I have pics of the engine w/ turbo in place, but I cannot find them

I got my parts from
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