Big block in a low hump - The 1947 - Present Chevrolet & GMC Truck Message Board Network

frost89434 · 08-17-2003, 02:08 AM

Is it possible to put a big block in a low hump cab 2wd? I was just wondering. My engine took a s%$t and I may have a chance to get a big block. JIM

highboy_04 · 08-17-2003, 02:09 AM

i thought the hump would only effect the tranny. i probably dont know much though. lol.

adamls · 08-17-2003, 08:51 AM

The only effect should be from the Tranny if the engine is in the V-8 position.

Longhorn Man · 08-17-2003, 09:35 AM

From whats been said here before, yes, if it is up front instead of in the I-6 position...and it may be kinda tight.
Highboy, the big block is a bit taller which raises the front of the tranny up a bit needing a bit more clearance, that is why big block trucks had hugh hump trannys.

Class of 69 · 08-17-2003, 10:34 AM

I have an original 69 2 wd frame with 396/th400. Cab was a low hump. You just need to mount the big block in the forward mounting holes of the front cross member. It is predrilled for this application. Bring on the BB !!

Longhorn Man · 08-17-2003, 11:30 AM

There were some made like that, just like my V6/TH400 GMC...with a high hump. No one can explain it.

highboy_04 · 08-17-2003, 01:48 PM

i got the high hump. i think.

miket · 08-17-2003, 03:32 PM

This is a low hump 71 that had a t350/350 combo.....it now has the ZZ502/T400. No mods....no clearance problem

72 CustomCamper · 08-17-2003, 04:42 PM

I put a big block in my 72. It was originally a small hump 350/th350 truck.It now has a 71 402 and a 700R4 using the small block engine stands...

Chuck

GMC Jim · 08-17-2003, 06:19 PM

my '71 has 402 eng with 400 trans and with low hump floor

frost89434 · 08-17-2003, 06:30 PM

Thanks for all the info guys. Very well appreciated. JIM

08-17-2003, 02:08 AM	#1
frost89434 Registered User Join Date: Nov 2001 Location: sparks, NV Posts: 1,141	Big block in a low hump Is it possible to put a big block in a low hump cab 2wd? I was just wondering. My engine took a s%$t and I may have a chance to get a big block. JIM __________________ 68 short fleet with 71 front clip 2wd jaguar blue 99 chevy ext cab shrtbed z71 loaded 99 chevy swb fleetside(daily driver) Sparks, Nevada

08-17-2003, 02:09 AM	#2
highboy_04 Registered User Join Date: Mar 2003 Location: kansas Posts: 1,071	i thought the hump would only effect the tranny. i probably dont know much though. lol. __________________ '67 c10 350/th350

08-17-2003, 08:51 AM	#3
adamls Gotta Startem Early Join Date: Oct 2001 Location: Amarillo, TX, USA Posts: 364	The only effect should be from the Tranny if the engine is in the V-8 position. __________________ 67 SWB In Progress, one piece at a time, maybe 3 years I will be finished

08-17-2003, 10:34 AM	#5
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	I have an original 69 2 wd frame with 396/th400. Cab was a low hump. You just need to mount the big block in the forward mounting holes of the front cross member. It is predrilled for this application. Bring on the BB !! __________________ 69 GMC K10 ..some restoration required....still..

08-17-2003, 01:48 PM	#7
highboy_04 Registered User Join Date: Mar 2003 Location: kansas Posts: 1,071	i got the high hump. i think. __________________ '67 c10 350/th350

08-17-2003, 09:35 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	From whats been said here before, yes, if it is up front instead of in the I-6 position...and it may be kinda tight. Highboy, the big block is a bit taller which raises the front of the tranny up a bit needing a bit more clearance, that is why big block trucks had hugh hump trannys.

08-17-2003, 11:30 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	There were some made like that, just like my V6/TH400 GMC...with a high hump. No one can explain it.

08-17-2003, 03:32 PM	#8
miket Registered User Join Date: Jan 2003 Location: Seattle WA Posts: 1,466	This is a low hump 71 that had a t350/350 combo.....it now has the ZZ502/T400. No mods....no clearance problem Attached Images __________________ FocuzTech Performance Evergreen Protective Coatings Gatorhyde...the best kept secret in spray in bed lining & protection

08-17-2003, 04:42 PM	#9
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,368	I put a big block in my 72. It was originally a small hump 350/th350 truck.It now has a 71 402 and a 700R4 using the small block engine stands... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"

08-17-2003, 06:19 PM	#10
GMC Jim Senior Member Join Date: Dec 2002 Location: Portland, Oregon Posts: 901	my '71 has 402 eng with 400 trans and with low hump floor __________________ '71 GMC;fleetside;PB/PS/AC/CC/402 Eng./Custom Paint/110,000act miles/3 fuel tanks(52gal).

08-17-2003, 06:30 PM	#11
frost89434 Registered User Join Date: Nov 2001 Location: sparks, NV Posts: 1,141	Thanks for all the info guys. Very well appreciated. JIM __________________ 68 short fleet with 71 front clip 2wd jaguar blue 99 chevy ext cab shrtbed z71 loaded 99 chevy swb fleetside(daily driver) Sparks, Nevada

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