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05-31-2011, 07:41 AM
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#1 |
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Registered User
Join Date: May 2011
Location: Nunica, Michigan
Posts: 1
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69 motor swap
Ok guys I need some input on swapping a 350 create motor for a 454! Is there any modification that I have to do with the mounts and the trans? Any information would be helpfull
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05-31-2011, 08:01 AM
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#2 |
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Registered User
Join Date: Jun 2007
Location: longview,wa.
Posts: 38
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Re: 69 motor swap
Hello, I've done this swap and if memory serves me rite, the only part you will need are big block towers.
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05-31-2011, 11:08 AM
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#3 |
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Registered User
Join Date: Apr 2008
Location: Imperial Beach, CA
Posts: 1,040
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Re: 69 motor swap
Just the towers and all the mounting brackets (PS/WP/ALT) need to be BBC ones. If your using the same trans then youll be fine. If going from a TH350 to a 400 then you need to move the trans mount and cut the drive shaft 5/8 in.
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69 c-10 BBC 462ci, forged crank, H-beam rods, 10.5-1 KB forged pistons, Dart Iron Eagle 308cc, Straub Cam, Comp Cams chrome moly full rollers, Weiand Team G, Prosystems 950, TH400/3500 Dalenzie stall, Currie 9+ Detroit Locker w/31spline axles.  3.5/6in drop. My Build.
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05-31-2011, 02:22 PM
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#4 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: 69 motor swap
The stock TH350 probably won't last very long behind a 454. Step up to that TH400.
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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06-01-2011, 12:59 PM
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#5 |
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Registered User
Join Date: Jun 2010
Location: Tyndall AFB FL
Posts: 214
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Re: 69 motor swap
I have the exact same question. Im trying to do all my research before i jump into this. I have an 84 K10 with a 305 bolted to a 700R4 to the best of my knowledge i will just need to pull the small block motor mounts and bolt in the BBC mounts. I will also have to use the alternator, power steering, and starter from the BBC. what else will i need to do to the small block engine bay to stuff the 454 in it? any help will be greatly appreciated
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84 Short bed 350: Hooker headers, flow master 40 series, edelbrock Intake manifold, Holly street avenger carb, 4 inch skyjacker suspension lift, 33x12.5 Toyo Open Country Mud Terrains, 3.73 gears 2011 Silverado LTZ |
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06-01-2011, 11:58 PM
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#6 |
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Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: 69 motor swap
You will probably need to figure out a different fan shroud than the one for the 305 and a 4 core radiator would probably be required to keep the 454 with the automatic cooled.
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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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06-02-2011, 01:13 AM
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#7 | |
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Registered User
Join Date: Jun 2010
Location: Tyndall AFB FL
Posts: 214
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Re: 69 motor swap
Quote:
__________________
84 Short bed 350: Hooker headers, flow master 40 series, edelbrock Intake manifold, Holly street avenger carb, 4 inch skyjacker suspension lift, 33x12.5 Toyo Open Country Mud Terrains, 3.73 gears 2011 Silverado LTZ |
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06-02-2011, 10:09 AM
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#8 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: 69 motor swap
The 700R4 is just like the TH350 mentioned earlier. Probably won't last long with a 454 putting all that torque through it.
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
Quote:
Quote:
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