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john68c10 · 06-12-2021, 01:10 PM

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 ?

06-12-2021, 01:10 PM	#1
john68c10 Registered User 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.