Buick Turbo 350 Tranny to SBC, How??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Baged72 · 12-02-2010, 09:53 PM

Picked up a turbo 350 tranny but its from a buick and they are shaped differently from a GM turbo 350 how can i mount this up???
Adapter plate? How can i order one??

70 shorty · 12-02-2010, 10:01 PM

I know there are adapater plates made to adapt a chevy bolt pattern trans to a BOP pattern block, so I assume it would work the other way too. I think the company is TransDapt if I remember right.

Baged72 · 12-02-2010, 10:13 PM

Thanks..., Actually found one from speedwaymotors its only $39 --- and can be used BOP to GM or GM To BOP

Nuts&bolts · 12-03-2010, 01:54 AM

I ran a Buick trans in 1 or mine old 72 gmc and it bolted right up I just left out the top bolt cause the buick had the notch up top. It worked good never had a problem. Just a little insite thought it might help
Posted via Mobile Device

arkansas · 12-03-2010, 11:48 AM

I think some of the trannies had both bolt patterns and some didn't. I had a T350 once that had both, and I've got a 200 4R that has both. But I think I've seen some that only had the top ears for the Buick and not the top Chevy holes.
If you don't have all the holes in the trans to match the engine, definitely get the adaptor.

57larry · 12-03-2010, 02:31 PM

an adapter plate can be used

OhOneWS6 · 12-03-2010, 10:51 PM

There are a lot of people that ran a Chevy trans bolted to a BOP motor or vise-versa with just 4 bolts in them back in the day. It's only the top 2 bolts that are different. The bottom 4 are the same. There were some cases made with both patterns. That adapter may also require spacers for the converter or flywheel depending on how thick it is.

Tommy454 · 12-03-2010, 10:59 PM

Just did the BOP Trans to Chevy block. Adapter plate from Speedway; comes with the hardware $47.53 shipped.

raycow · 12-04-2010, 03:15 PM

Only the bottom two bolts and the dowel pins are common between BOP and Chevy. Nothing else lines up unless you have a dual pattern bellhousing.

Ray

69 longhorn · 12-04-2010, 05:12 PM

Quote:

Originally Posted by raycow

Only the bottom two bolts and the dowel pins are common between BOP and Chevy. Nothing else lines up unless you have a dual pattern bellhousing.

Ray

2nd that....

spend the 50 or 60 bones on the adaptor....or build your own part(been there done that). Just dont forget to add the thickness of the adaptor plate to the (tween the flexplate & converter), & you need to be sure that the center hub on the verter is NOT pulled back far enough that it doesnt pilot in the "big hole" on the crankshaft.

crazyAl

LONGHAIR · 12-04-2010, 05:21 PM

Quote:

Originally Posted by OhOneWS6

There are a lot of people that ran a Chevy trans bolted to a BOP motor or vise-versa with just 4 bolts in them back in the day. It's only the top 2 bolts that are different. The bottom 4 are the same.

Correct, the bottom 4 are the same, it's only the top 2 that are different. I have seen it done, but I wouldn't run one like that myself.

69 longhorn · 12-04-2010, 06:44 PM

Quote:

Originally Posted by LONGHAIR

Correct, the bottom 4 are the same, it's only the top 2 that are different. I have seen it done, but I wouldn't run one like that myself.

If you are talking bolts.....No sir they are not the same! As Raycow posted,ONLY the bottom 2 bolts, & the 2 dowels match, tween the BOP & the Chevy trans. The exception was the dual pattern (Chev/BOP). then all 6 bolts worked on EITHER engine.

crazyAl

12-02-2010, 09:53 PM	#1
Baged72 Registered User Join Date: Mar 2009 Location: Sac Town, CA Posts: 146	Buick Turbo 350 Tranny to SBC, How??? Picked up a turbo 350 tranny but its from a buick and they are shaped differently from a GM turbo 350 how can i mount this up??? Adapter plate? How can i order one?? __________________ 72 GMC SB Built 400 SBC B&M TH350 12Bolt Posi 4:11 Bagged

12-02-2010, 10:01 PM	#2
70 shorty Where's my beer? Join Date: Oct 2004 Location: Glen Allen, VA Posts: 1,772	Re: Buick Turbo 350 Tranny to SBC, How??? I know there are adapater plates made to adapt a chevy bolt pattern trans to a BOP pattern block, so I assume it would work the other way too. I think the company is TransDapt if I remember right. __________________ 70 C10, shortstep, .30 over 250,Hurst shifted 3 spd parts hauler. Holley 390, Clifford Intake, Header, ported cylinder head, unknown bigger cam. 79 Corvette L82, 4 spd, black, red interior, headers, flowmasters, and unkown bigger cam. '03 Grand Cherokee Laredo, 4.0 4x4 daily driver. 165K miles, and runs great '08 Tahoe LTZ 4x4 155K

12-02-2010, 10:13 PM	#3
Baged72 Registered User Join Date: Mar 2009 Location: Sac Town, CA Posts: 146	Re: Buick Turbo 350 Tranny to SBC, How??? Thanks..., Actually found one from speedwaymotors its only $39 --- and can be used BOP to GM or GM To BOP __________________ 72 GMC SB Built 400 SBC B&M TH350 12Bolt Posi 4:11 Bagged Last edited by Baged72; 12-02-2010 at 10:19 PM.

12-03-2010, 01:54 AM	#4
Nuts&bolts Registered User Join Date: Nov 2010 Location: Redding ca Posts: 3	Re: Buick Turbo 350 Tranny to SBC, How??? I ran a Buick trans in 1 or mine old 72 gmc and it bolted right up I just left out the top bolt cause the buick had the notch up top. It worked good never had a problem. Just a little insite thought it might help Posted via Mobile Device

12-03-2010, 11:48 AM	#5
arkansas Registered User Join Date: Jan 2008 Location: Pleasant Plains, Arkansas Posts: 51	Re: Buick Turbo 350 Tranny to SBC, How??? I think some of the trannies had both bolt patterns and some didn't. I had a T350 once that had both, and I've got a 200 4R that has both. But I think I've seen some that only had the top ears for the Buick and not the top Chevy holes. If you don't have all the holes in the trans to match the engine, definitely get the adaptor. Last edited by arkansas; 12-03-2010 at 11:57 AM.

12-03-2010, 02:31 PM	#6
57larry Registered User Join Date: Nov 2007 Location: Indianapolis Posts: 1,161	Re: Buick Turbo 350 Tranny to SBC, How??? an adapter plate can be used

12-03-2010, 10:51 PM	#7
OhOneWS6 Registered User Join Date: Dec 2009 Location: DFW, TX Posts: 764	Re: Buick Turbo 350 Tranny to SBC, How??? There are a lot of people that ran a Chevy trans bolted to a BOP motor or vise-versa with just 4 bolts in them back in the day. It's only the top 2 bolts that are different. The bottom 4 are the same. There were some cases made with both patterns. That adapter may also require spacers for the converter or flywheel depending on how thick it is. __________________ 72 Cheyenne Super 1/2 LWB White/Dark Yellow 07 Avalanche 2LT 74 Sleek Craft Rebel Jet Boat W/Pontiac 400

12-03-2010, 10:59 PM	#8
Tommy454 Registered User Join Date: Oct 2010 Location: Weeki Wachee , Fl Posts: 112	Re: Buick Turbo 350 Tranny to SBC, How??? Just did the BOP Trans to Chevy block. Adapter plate from Speedway; comes with the hardware $47.53 shipped.

12-04-2010, 03:15 PM	#9
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: Buick Turbo 350 Tranny to SBC, How??? Only the bottom two bolts and the dowel pins are common between BOP and Chevy. Nothing else lines up unless you have a dual pattern bellhousing. Ray __________________ Live more responsibly. Eat lower on the food chain. Eat vegetarians.



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