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429 motor and c6 trans
I have a 429 with a c6 trans attached. Out of a 71 thunderbird. Is the transmission the same length? And will it bolt right up to the cross member?

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The information at this link indicates that all cars, except Lincolns, had the same length tailshaft housing:

“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
[+] 1 user Likes Don C's post
I'm about 99% sure the MM and frame perches are different..  The T-bird uses the wider mounts that were in LTD and other large corp cars. I'm putting a 70 LTD motor in mine and have ran into this issue myself. Basically, the LTD type mount is wider f-r by about 1" and are offset too much to put the engine, tranny in the right location. Picture below may help you identify them.
[Image: WP_20171203_18_21_40_Pro.jpg]

 https://www.rockauto.com/en/moreinfo.php...802&jsn=12 is the LTD, T-Bird mount

https://www.ebay.com/p/1971-1972-1973-Fo...0005.m1851 appears to be the correct MM for the Mustang.
[+] 1 user Likes Wilco549's post
My 72 T-bird with a 429 had the long tailshaft.

Another issue will be the column shift bellcrank on the trans doesn't play well with a floor shift.

[+] 1 user Likes Hemikiller's post
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