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09-05-2007, 06:28 PM
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#1 |
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Registered User
Join Date: Mar 2007
Location: Kennewick, WA
Posts: 65
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Big Block Trees
Can someone tell me why I need to change the trees when I pull the small block for a big one?
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hooberjon@yahoo.com "Life's Been Good To Me So Far" 1941 Chevy PU (new project, right out of the field) 1948 P/U: 350/700r4, Nova Clip,Chevelle rear, air ride suspension, custom door handles, custom firewall, custom dash, buckets and console, visor 1967 C20: 427 Tall Deck, Turbo 400 with Gear Vendors aux tranny, 5th wheel, 3500 bucket seats and console. 1996 Geo Tracker 2x4 1996 Geo Tracker 4x4 |
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09-05-2007, 06:57 PM
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#2 |
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Aluminum slot wheels rule...
Join Date: Jan 2006
Location: Maine
Posts: 6,211
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Re: Big Block Trees
Whats this "tree" your talking about?
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09-05-2007, 07:06 PM
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#3 |
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Registered User
Join Date: May 2006
Location: Jonesboro, AR
Posts: 916
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Re: Big Block Trees
Motor towers where the motor mounts to the frame and front Xmember?
SBC towers weren't designed for the monster torque of the BB maybe? Same reason you don't find a TH350 behind any BBC from the factory. I would also say the external dimensions are accounted for in the big block towers. Let the fan line up with the rad. shroud, keep the valve covers out of the firewall and brake booster. I won't say you can't use them because someone probably already has and has solved these problems. Last edited by 71tahoe; 09-05-2007 at 07:10 PM. |
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09-05-2007, 07:08 PM
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#4 | |
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Registered User
Join Date: Sep 2002
Location: DFW Texas
Posts: 2,269
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Re: Big Block Trees
Quote:
Weight distribution. |
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09-05-2007, 07:25 PM
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#5 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Big Block Trees
maybe so the engine will fit with the proper driveline geometry// why do you think gm spent a bunch of money designing individual parts for
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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09-05-2007, 07:45 PM
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#6 |
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Senior Moment
 
Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,193
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Re: Big Block Trees
The SB "Trees" have a smaller stump. Seriousy you need the BB "Trees" to make the exhaust fit right. Useing SB towers with a BB your stock Exhaust Manifolds will hit the frame and I think you have problems with Headers also
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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09-05-2007, 09:16 PM
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#7 | |
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Always on the hunt...
 Join Date: Sep 2006
Location: Portland, OR.
Posts: 5,764
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Re: Big Block Trees
Quote:
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09-05-2007, 10:12 PM
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#8 |
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Registered User
Join Date: Feb 2004
Location: Tacoma WA
Posts: 1,365
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Re: Big Block Trees
48ish - you could definitely use the stronger BB parts especially since you have been buying the "tall deck" goodies to put out even more power and torque.
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67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow |
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09-06-2007, 12:56 AM
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#9 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: Big Block Trees
strength isn't the issue, it's fitment. The main reason is for exhaust pipe space.
However, a secondary reason, would be so the fan is located properly in the shrowd. |
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