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Old 02-28-2007, 07:02 PM
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Late model C4

Since it was recommended I not install the early model C4 in my Falcon due to the 450 horsepower I'm installing I purchased a 78 C4 and now find that I will need a different rear support bracket. Any experience with this issue?
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Old 03-01-2007, 08:36 PM
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What year is your falcon? I'm assuming that the c-4 you have has the same mount as all non-falcon c-4 transmissions. You can get an aftermarket mount that is much stronger than the factory setup from Falcon Enterprises as well as several other vendors.
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Old 03-01-2007, 09:51 PM
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The early and late C4 is the same size. The best crossmember to use is the one from www.falconparts.com. Get a 72 or later case fill C4. Upgrade to a hardened input shaft and you'll be fine.
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Old 03-01-2007, 10:50 PM
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C4

My Falcon is a C4. Am I misunderstanding something. You mention that they are the same size? I already had a C4 in the car but everything points to a different support for the 78 that I have. If all the C4's are the same does that mean I can use the support I have been using?
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Old 03-03-2007, 01:02 PM
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There was a change to the tailhousing. The early ones used the donut style mount and had the bolts inline to the tailhousing. The later ones used a mount that was perpendicular to the tranny. My C4 has holes for both style mounts. Yours may work with the early mount. The first year for the C4 in a Falcon was 65 so if you have an original 65 mount then it may work. The FalconParts.com mount will still be stronger than the original and I would recommend it if you going for big HP numbers.
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