BB onto 2wd - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Steven B** · 11-22-2005, 12:09 PM

I'm getting ready to put in my BB with T-400 trans in my Blazer. Do I need to put in a high hump or will my low hump work?

qksilver · 11-22-2005, 12:26 PM

The high hump is for the 400 trans
Steve

**Steven B** · 11-22-2005, 12:29 PM

Thanks

Longhorn Man · 11-22-2005, 04:12 PM

Since the engine is a big block, yes, you should use the high hump. On the piuckups, ppl get away with low humps and big block/TH400 combos all the time, but no tellin on a blazer. (we are talkin 2 wheel drive yes?)

**Steven B** · 11-22-2005, 05:21 PM

Yes. The TH350 in it now was just rebuilt last year. I might leave it in until I have the TH400 rebuilt. Now I just have to get rid of the rest of the truck it came in

Striker169 · 11-22-2005, 06:14 PM

I think generally the rule of thumb is to have the high hump but you can get away with it if you have new cab mounts or well body mounts for the blazer

409biscayne · 11-22-2005, 09:21 PM

Quote:

Originally Posted by Steven B

Yes. The TH350 in it now was just rebuilt last year. I might leave it in until I have the TH400 rebuilt. Now I just have to get rid of the rest of the truck it came in

I've got to ask , what did it come in? I'm always looking for parts , especially t400 w/big block trucks . I can always hope , right. Thanks.

**kwmech** · 11-22-2005, 11:13 PM

My 69 GMC has a factory turbo 400 and it is low hump with a fair amount of room. You'll probably be ok

3qtrtontarrer · 11-23-2005, 09:10 AM

ive got a factery low hump on my BB 69 cab im building.

**Steven B** · 11-23-2005, 11:20 AM

It came in a 69 CST/20 Longhorn

11-22-2005, 12:09 PM	#1
Steven B Senior Member Join Date: Jan 2000 Location: LHC, AZ Posts: 385	BB onto 2wd I'm getting ready to put in my BB with T-400 trans in my Blazer. Do I need to put in a high hump or will my low hump work?

11-22-2005, 12:26 PM	#2
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: BB onto 2wd The high hump is for the 400 trans Steve

11-22-2005, 12:29 PM	#3
Steven B Senior Member Join Date: Jan 2000 Location: LHC, AZ Posts: 385	Re: BB onto 2wd Thanks

11-22-2005, 04:12 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: BB onto 2wd Since the engine is a big block, yes, you should use the high hump. On the piuckups, ppl get away with low humps and big block/TH400 combos all the time, but no tellin on a blazer. (we are talkin 2 wheel drive yes?)

11-22-2005, 05:21 PM	#5
Steven B Senior Member Join Date: Jan 2000 Location: LHC, AZ Posts: 385	Re: BB onto 2wd Yes. The TH350 in it now was just rebuilt last year. I might leave it in until I have the TH400 rebuilt. Now I just have to get rid of the rest of the truck it came in

11-22-2005, 06:14 PM	#6
Striker169 Car O'Holic Join Date: Jan 2005 Location: Austin, Tx. Posts: 692	Re: BB onto 2wd I think generally the rule of thumb is to have the high hump but you can get away with it if you have new cab mounts or well body mounts for the blazer

11-22-2005, 11:13 PM	#8
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,600	Re: BB onto 2wd My 69 GMC has a factory turbo 400 and it is low hump with a fair amount of room. You'll probably be ok

11-23-2005, 09:10 AM	#9
3qtrtontarrer Registered User Join Date: Oct 2005 Location: NH Posts: 93	Re: BB onto 2wd ive got a factery low hump on my BB 69 cab im building.

11-23-2005, 11:20 AM	#10
Steven B Senior Member Join Date: Jan 2000 Location: LHC, AZ Posts: 385	Re: BB onto 2wd It came in a 69 CST/20 Longhorn

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