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will a 68 coupe, 289, c-4 auto driveshaft work on a 66 coupe 289, c-4??? in my book it looks like they might use different u-joints in the back but they are the same length and it has the right splines?? has anyone ever done this or somthing similar?? and does anyone have a drive shaft? ive been looking for a while and the woodenville ranch wont even e-mail me back!!! ::
 

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According to my Hollander parts interchange book, it won't fit. Doesn't give me a reason but exchange codes are different. The 68 driveshaft will fit a 67-70 small block AT car.

As far as I can tell, only a drive shaft from a 65-66 non "K" code small block V8 will work.

Steve

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The Ford Master Parts Catalog has dozens of pages just on driveshafts. Amazingly complicated topic.

As for the 68 289 C4 applications, generally it is 3" diameter and uses either the 1330 (3 5/8") u-joint or the 1310 u-joint (3 1/4"). They show 3 separate numbers just for the 289 4v, 2v and GT vs non-GT. They are about 50 3/32 long.

The 66 289 2v, 4v and 200 C4 all use the same shaft and it's
2 3/4" diameter, uses 1260 u-joints (3 15/32")and can be between 50 25/32 and 51 1/16 (no reason why).
I suspect it's early vs late.
The hi-po doesn't work because of it's length. The 9" carrier puts the u-joint further towards the front due to its size. It's about 49 23/32".

Since the 200/C4 works, that opens up your field a little.
 
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