High hump question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

otsenre · 02-09-2008, 01:11 PM

Anybody know if I can install a 402 bigblock with 400 tranny on a pickup with low hump or will I need to cut low hump and use a high hump tunnel. I have crawled under and seems like there is plenty of clearance, so why the big block high hump?

**LockDoc** · 02-09-2008, 01:30 PM

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My white '67 has a 454/th400 with a low hump. As far as I know it has stock cab mounts under it.

LockDoc

scott's69 · 02-10-2008, 03:59 AM

Ive got a 350 w/ 400 turbo and low hump....no clearance issue.

otsenre · 02-10-2008, 07:59 AM

Quote:

Originally Posted by LockDoc

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My white '67 has a 454/th400 with a low hump. As far as I know it has stock cab mounts under it.

LockDoc

Do all factory big blocks have high humps? Does your interior get hot in summer time?

71 super · 02-10-2008, 08:36 AM

I have seen a 69 CST with factory BB, bucket seats and factory air shocks per the SPID w/th400 that was a low hump truck- but it was a lwb. Parted out a 72 lwb w/402 that was a low hump cab as well. Both were very original trucks and definitely factory bb trucks, so it ,at least from what I have seen, could and did happen from the factory. My 71 Super is a high hump bb truck with th400 and buckets so I am not positive, but there is room without the high hump.

**LockDoc** · 02-10-2008, 12:45 PM

Quote:

Originally Posted by otsenre

Do all factory big blocks have high humps? Does your interior get hot in summer time?

I can't answer the first question. As far as the heat, it doesn't get any hotter inside than my '36 Ford street rod or the '39. Just open the windows and vents and ... Cruise.....

LockDoc

02-09-2008, 01:11 PM	#1
otsenre Registered User Join Date: Feb 2007 Location: Colorado Springs, Co Posts: 1,939	High hump question Anybody know if I can install a 402 bigblock with 400 tranny on a pickup with low hump or will I need to cut low hump and use a high hump tunnel. I have crawled under and seems like there is plenty of clearance, so why the big block high hump?

02-09-2008, 01:30 PM	#2
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,818	Re: High hump question - My white '67 has a 454/th400 with a low hump. As far as I know it has stock cab mounts under it. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

02-10-2008, 03:59 AM	#3
scott's69 WORTHLESS CRUISERS Join Date: May 2002 Location: Lancaster, SC Posts: 237	Re: High hump question Ive got a 350 w/ 400 turbo and low hump....no clearance issue. __________________ Scott Hammond Lancaster, SC 1969 Chevy2005 Chevy Silverado Z71 72 Chevy 1972 SWB 454 If you don't live for something, then you'll die for nothing. www.xclusive-images.com

02-10-2008, 08:36 AM	#5
71 super Registered User Join Date: Sep 2005 Location: Canton North carolina Posts: 3,080	Re: High hump question I have seen a 69 CST with factory BB, bucket seats and factory air shocks per the SPID w/th400 that was a low hump truck- but it was a lwb. Parted out a 72 lwb w/402 that was a low hump cab as well. Both were very original trucks and definitely factory bb trucks, so it ,at least from what I have seen, could and did happen from the factory. My 71 Super is a high hump bb truck with th400 and buckets so I am not positive, but there is room without the high hump.



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