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#1
03-28-2012, 06:53 PM
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Convert to 454???
Hi,
I have a 69 Chevell SS (my dream car) that needs the 454 and a 400TB put in. The motor mounts are still attached to the motor. My husband says he would put rocker mounts on it instead. I guess my question is what is the easiest way to put this motor in? Also, will I need to change the driveshaft? We think it had a turbo 350 before. Thank you for your time!! Valentine 
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#2
03-28-2012, 07:11 PM
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Hi Valentine. It is nice to see another female car lover here. Welcome !
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Get in, sit down, shut up, hold on...cause Ms Grumpy is driving ! For the audio geek try: www.audiokarma.org
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#4
03-29-2012, 06:10 AM
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Welcome and yes the TH350 is a different yoke than the TH400. The TH400 has a larger diameter and more splines on the output shaft. I just converted from a TH375 to a TH400 and needed a new driveshaft made up.
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Jay Blue 1971 Malibu 350ci, th400 and many small projects on the go
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#5
03-29-2012, 07:44 AM
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I responded to your PM...
The existing driveshaft can be shortened and the TH400 slip yoke installed on it. Hopefully you have a passenger tranny and not one from a truck/van. Those truck TH400 have a bolt in yoke although there is a way to work around that when installing in a passenger vehicle. I've done this tranny upgrade swaps numerous times...
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2017 Camaro RS -217 cu in 365 HP w/8 speed auto 1967 Camaro SS -5.3L LS w/4L60E & 4.11 12 bolt 2019 Cadillac XT5 3.6L V6 w/310 HP & 8 speed AWD Last edited by BillsCamino; 03-29-2012 at 07:50 AM.
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