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05-07-2006, 01:09 AM
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#1 |
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Registered User
Join Date: Mar 2006
Location: Sacramento, CA
Posts: 30
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67' question
I guess its actually a 70 question. Ive got a 67 longbed with a 70' 350 in it. It has a four speed with granny gear. Im looking for an automatic and would really like to fit a Th400. Does anyone know if it can be directly bolted? Or any that can? Thnx
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05-07-2006, 01:31 AM
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#2 |
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10/30/19
Join Date: Aug 2004
Location: ottawa kansas
Posts: 5,245
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Re: 67' question
Absolutely,a 400 turbo hydromatic will bolt up to your 350 no matter what year it is.A th350 will also do the job.Some say that the th350 shifts harder.
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Fight the good fight, finish the race, keep the faith |
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05-07-2006, 06:27 AM
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#3 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: 67' question
I think you`ll need an automatic croos-member.The 4wds swap right in,that`s all I`ve done.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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05-07-2006, 06:41 AM
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#4 |
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Senior Member
 
Join Date: Feb 2004
Location: Williamsburg, Ohio
Posts: 1,798
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Re: 67' question
I would like your sm420 4 speed if it is good condition. Shipping would be high most likely. zip 75022 I can pick it up at a truck terminal including ups or fedex.
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05-07-2006, 07:02 AM
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#5 |
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Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
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Re: 67' question
going to a 400 turbo will require the drive shaft to be shortened. A 350 turbo with a short shaft tail, is a direct bolt in.
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1997 GMC Sierra Ext 1965 Mustang |
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05-07-2006, 11:53 AM
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#6 |
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Senior Member
Join Date: Dec 2004
Location: Southern Pines NC
Posts: 3,853
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Re: 67' question
A chevy 400 will bolt, there are B/O/P patterns also
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05-07-2006, 12:59 PM
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#7 |
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Senior Member
Join Date: Jul 2004
Location: Estherville, Iowa
Posts: 3,371
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Re: 67' question
I think you will have to remove the front manual crossmember for clearance. The SM420 may have a driveshaft yoke that the driveshaft bolts to similar to the rear end. If that is the case, driveshaft mods will be needed. Your current shaft likely has a slip joint near the hanger bearing, and that wont work with and auto setup. Might be cheaper to find the front half or whole shaft from a truck with whichever trans you use, there should be plenty still around.
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1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 |
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05-07-2006, 03:52 PM
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#8 |
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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: 67' question
this would be an easy swap being that the truck could come with a TH400 or a TH350 in 70 hooked to that engine.
You'll need; Tranny probbably drive shaft mods/replacement yoke tranny cooler lines tranny cooler (real big one if you don't have one in the rad) a way to shift it (aftermarket shifter on the floor or a new column, good time to get a van tilt unit) auto tranny cross member tranny mount Shift linkages (n/a if going with an aftermarket shifter) *MIGHT* need a longer speedo cable |
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