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#1 |
Registered User
![]() Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Changing out my towers
My '68 was originally a 6 cylinder that someone put a 305 in. They used the 6 cylinder towers so the engine sits back too far. I know some guys like it this way and say run it like that, but it bugs me. So, I'm thinking of picking up some small block towers and doing it right. The question is will I have to change anything else? i.e. Trans crossmember or shift linkage. Will my driveshaft be too short, etc? I'm currently running a 3 speed, but would like to find a 4 or 5 speed that would fit.
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BRENT ![]() -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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#2 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,515
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Re: Changing out my towers
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Yes, the trans cross member will have to be moved forward (there should be holes in the frame for the location). The shift rods and clutch rod will be too long and will have to be adjusted, and the drive shaft will be too short. You should be able to find a factory one the right length, it will probably be a two piece shaft. Throttle linkage will also be too short. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 05-01-2009 at 11:54 AM. |
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#3 | |
Registered User
![]() Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: Changing out my towers
Quote:
Shift Linkage isn't a problem because p.o. put a shifter in the floor. What about clutch linkage? I guess it is a different setup.
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BRENT ![]() -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Changing out my towers
In reality, it sisn't worth the headache. I'm with you, I would rather see it forward where it belongs, but it just isn't worth it IMO.
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#5 |
Registered User
![]() Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: Changing out my towers
That's disappointing. Has anyone had issues with cooling on a small block on 6 cylinder towers? The way it is right now, the fan is not even close to being in the shroud.
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BRENT ![]() -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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#6 |
I'M TRUCK CRAZY!
Join Date: Oct 2006
Location: Sachse, TEXAS
Posts: 1,737
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Re: Changing out my towers
the 6 cyl and sb towers are the same. just in different locations. Forward for the sb and back for the 6.
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#7 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,515
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Re: Changing out my towers
Quote:
LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 05-01-2009 at 10:03 PM. |
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#8 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: Changing out my towers
They are definitely different. I have piles of each in my shop. Similar, but not quite the same.
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I'm on the Instagram- @Gearhead_Kevin |
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Changing out my towers
the 4 wheel drive trucks had the small block bach where yours is now. You could either get a spacer to push the fan forward (not recomended if you have a fan clutch) or source a 4X4 shroud
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#10 |
Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: Changing out my towers
Or run an electric fan setup. Electric fan setups can be found by doing a search.
Danny
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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#11 |
Registered User
Join Date: Dec 2003
Location: Thomasville, NC
Posts: 1,877
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Re: Changing out my towers
my truck was a 6 now a 8, motor is in the 6 location no problem over heating with 3 core radiator,plans to put it were the 8 should be, with a tremec transmission 5 speed check out there wed site, www.americanpowertrain .com, i talk to them at at auto fair in N.C. they have every thing to put in our trucks, most orders are ship within 48 hours, just check the site
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#12 |
I'M TRUCK CRAZY!
Join Date: Oct 2006
Location: Sachse, TEXAS
Posts: 1,737
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Re: Changing out my towers
oh,
Kevin, you got some pics to show the difference. I really thought they were the same. For the sb and 6. |
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#13 |
Registered User
![]() Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: Changing out my towers
Yeah, pics would be great.
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BRENT ![]() -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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#14 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: Changing out my towers
Here are pictures to illustrate the differences.
The I6 stands obviously go in the three rear holes. When you try to move them forward, only two of the three holes line up. You have to drill the third one. When you use the proper SBC frame stands, all three holes line right up in the forward position without drilling anything. You can obviously make either one work in either position, but to do it right, with no modifications, the proper stands are needed.
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I'm on the Instagram- @Gearhead_Kevin |
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#15 |
I'M TRUCK CRAZY!
Join Date: Oct 2006
Location: Sachse, TEXAS
Posts: 1,737
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Re: Changing out my towers
They are definitely not the same. Thanks for the pics. This should help people out.
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#16 |
Senior Member
![]() Join Date: Apr 2008
Location: Franklinton NC
Posts: 1,309
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Re: Changing out my towers
The truck should handle better with the motor in the rear position.
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#17 |
Registered User
![]() Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: Changing out my towers
Thanks for the pics, Tx.
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BRENT ![]() -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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#18 |
Registered User
![]() Join Date: Sep 2006
Location: Hendersonville, TN
Posts: 1,528
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Re: Changing out my towers
The other obvious difference is that sb towers are considerably dirtier than I6. Can't believe no one mentioned that.
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BRENT ![]() -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half |
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#19 |
Senior Member
![]() Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,848
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Re: Changing out my towers
thats true mine are filthy but the inline 6 ones sitting in my garage havent gatered any oil covered dirt in years!!
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#20 |
Designated Grumpy Old Man
![]() Join Date: Oct 2001
Location: arlington, washington usa
Posts: 3,092
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Re: Changing out my towers
I guess thats why my engine sits up so high and back so far in my 4x4. Can't even get a stock air filter on as it hits the firewall.
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Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg |
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