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Old 06-12-2021, 01:10 PM   #1
john68c10
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Join Date: Sep 2007
Location: Cookeville, TN
Posts: 53
Driveshaft Question

Okay, so I'm doing a "piece at a time" swap in my 68C10 from a 327SBC w/3spd manual with factory rear (truck) 12bolt to a 454BBC with 4L60E overdrive auto and (passenger car) 12bolt posi.

I'm hoping to do the trans swap first. I know that I'll need a new driveshaft.

I need to know if, when done but still behind the SBC, will I then need a 2nd new driveshaft when converting to BBC...or put another way...

Is there any difference whatsoever in trans bellhousing (horizontal) locations between SBC and BBC ?

and then is there any difference between 12bolt (truck) and 12bolt (car) nose lengths ?

Last edited by john68c10; 06-12-2021 at 01:26 PM.
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Old 06-12-2021, 04:40 PM   #2
kwmech
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Join Date: Mar 2003
Location: Colfax-California
Posts: 8,480
Re: Driveshaft Question

Yes. If you use the factory big block stands for the big block conversion it will push the transmission back 1'' from the small block position
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Old 06-12-2021, 04:45 PM   #3
68Gold/white
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Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,319
Re: Driveshaft Question

Quote:
Originally Posted by kwmech View Post
Yes. If you use the factory big block stands for the big block conversion it will push the transmission back 1'' from the small block position
DO the 68-71 and the 72 clam shell stands put the engine in the same spot??? if you know.......
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