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06-11-2008, 09:14 PM
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#1 |
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Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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engine swap?
1967 gmc short step 305 v6 th400 tranny all stock.Want to drop in a built 350 what will work and what wont?
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06-11-2008, 09:26 PM
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#2 |
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Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Engine swap?
Sorry i posted in the welcome area.I just picked up a 1967 gmc short step 305e v6 th 400 all stock ps pb tach dash posi rear want to drop in a built 350 what will work and what wont? Engine mounts? tach? Any ifo would be great.
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06-11-2008, 10:02 PM
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#3 |
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Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: Engine swap?
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06-11-2008, 10:27 PM
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#4 |
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Truck and auto performance nut
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,848
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Re: Engine swap?
you'll need V8 engine towers and a V8 tach
__________________
Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken |
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06-11-2008, 10:50 PM
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#5 |
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Gone Fishing
Join Date: Aug 2005
Location: Fort Worth, Texas 76135
Posts: 12,361
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Re: engine swap?
Welcome to the board from Texas
__________________
68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop  Frame of resto has been started2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616 |
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06-11-2008, 10:58 PM
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#6 |
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Registered User
Join Date: Apr 2008
Location: Gales Creek, Oregon
Posts: 619
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Re: engine swap?
Here is some info I found looking this up:
FYI the 305 v6 engine is not a street performer due to the RPM (3700) ranges. The engine was designed as a work horse not a hot rod. and the mounting of a 305 v6 is weird due to the trans has no mount on it only the block and bell housing has the mounts. the trans hangs off the back of the motor with only the bell housing bolts holding it on. So Looks like you will be making Motor Mounts changing Bell housing. However the trans TH400 is common and might work with a new bell housing. There will be the obvious usual stuff that is easier to update then try to modify to work with your existing electrical harness. Hei distributor wiring would be a new 12+ wire and Tach (if you have one). Then bypass the original external voltage regulator and use a 1 wire GM has always been the easiest for me. The stock Alt. Might work depending on the brackets and water pump pulley alignment. Hope that helps.
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There are two kinds of people, those who finish what they start and so on. 70 GMC Longhorn (A.K.A Money Bucket) 57 Chev 3100 05 Chevy LLY Dmax. 67 Chevy Camaro Dad's Budget Build 55 My Longhorn Build |
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06-12-2008, 01:15 AM
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#7 |
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BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,791
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Re: Engine swap?
Nice project...you should post this over on the main board, not in the burb area...LOL...keep trying you'll get it right yet =)
Last edited by CG; 06-12-2008 at 01:16 AM. |
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06-12-2008, 01:35 AM
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#8 |
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Designated Grumpy Old Man
 
Join Date: Oct 2001
Location: arlington, washington usa
Posts: 3,092
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Re: Engine swap?
I will move it for you. And give CG a demerit just for fun.
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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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06-12-2008, 02:10 AM
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#9 |
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Saving 1 truck at a time!
Join Date: Aug 2001
Location: Kent, WA
Posts: 6,465
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Re: Engine swap?
Drop it and drive it...AWESOME truck!
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'68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) |
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06-12-2008, 06:41 AM
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#10 |
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Step Brother
Join Date: Sep 2007
Location: K-town
Posts: 4,029
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Re: engine swap?
 from Knoxville Tn....
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06-12-2008, 09:10 AM
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#11 |
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Catchy title goes here..
 
Join Date: Mar 2002
Location: Rockwell, NC
Posts: 39,733
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Re: engine swap?
i merged both posts together for you, so you do not have to look all over for your post. sorry bout the confusion and you should get the answers you need now
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06-12-2008, 09:22 AM
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#12 |
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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: engine swap?
Welcome... Nice find. I've been looking for a 67-68 stepside myself but haven't had much luck.
Some will tell you to keep it stock. Just rebuild the old workhorse and fix the truck up. But, for simplicity, a 350 definitely is the way to go. You may be able to get the parts you need from the guys here on the site. I'm not familiar enough with the v6 to give input. My 68 GMC is a plain 250 six with three speed standard. Last edited by 68gmsee; 06-12-2008 at 09:22 AM. |
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