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12-16-2017, 03:41 PM
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#1 |
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425hp409
 
Join Date: Oct 2008
Location: Prosper Texas
Posts: 833
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High Hump or Low Hump
I have a 68 with a Low Hump and already installed a 700R4 trans and am going to be installing a Big Block. I am doing the engine swap as close to original as possible. Did all Big Block trucks come with a High Hump?
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Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette |
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12-16-2017, 06:46 PM
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#2 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Re: High Hump or Low Hump
yes, I would say high hump on the BB engine.....It sits between the I-6 & sb position, & is also mounted a little higher in the frame. This is due to the BB mounts /stands. You can mount the BB on sb stands......but, you will never get the headers/manifolds to fit that app.
 Longhorn
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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12-17-2017, 02:00 AM
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#3 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,388
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Re: High Hump or Low Hump
I think the majority of them had high humps, but I've got a 68 with a big block and a T400 with a small hump. When I first got the truck it was pretty close to rubbing on the top of the trans, but after new body mounts it clears just fine. I can get my hand around the top of it
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12-17-2017, 10:50 AM
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#4 | |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: High Hump or Low Hump
Quote:
Also, you could possibly add shims to lift higher. That would be better than cutting up the truck.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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12-17-2017, 03:05 PM
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#5 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,388
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Re: High Hump or Low Hump
I've seen factory shims, square in design. I think they used them to get the body lines to line up when needed.
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