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Author Topic: Changing Throttle Body  (Read 4181 times)

Offline Unofficial

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Changing Throttle Body
« on: November 07, 2008, 04:19:52 pm »
I came across a throttle body for a 350 on craigslist, and I want to buy it because I'm running a 305 TB on my 350 right now, which I believe is causing some problems. First of all, what should I look for on the TB to make sure that it's in good shape and that it's actually for a 350? Also, what years will be compatible with my '87 350 motor? Would I be better off changing the injectors or the whole TB? Details would be appreciated, so I can finish the job myself. Thanks in advance for any help.  :)
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1987 Custom Deluxe R10
350 TBI bored .040 over
700r4 with a Transgo shift kit
MSD ignition
Long tube headers w/ true duals
Upgraded sound system w/ subwoofer

Offline VileZambonie

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Re: Changing Throttle Body
« Reply #1 on: November 07, 2008, 06:57:29 pm »
Well what does he want for the throttle body
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Unofficial

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Re: Changing Throttle Body
« Reply #2 on: November 07, 2008, 10:13:34 pm »
$40
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1987 Custom Deluxe R10
350 TBI bored .040 over
700r4 with a Transgo shift kit
MSD ignition
Long tube headers w/ true duals
Upgraded sound system w/ subwoofer

Offline VileZambonie

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Re: Changing Throttle Body
« Reply #3 on: November 08, 2008, 09:31:58 am »
For $40 bucks it's worth it.
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                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Unofficial

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Re: Changing Throttle Body
« Reply #4 on: November 08, 2008, 02:09:29 pm »
So is there any way to make sure that it's a 350 TB? And would I be better off swapping just the injectors or the whole unit?
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1987 Custom Deluxe R10
350 TBI bored .040 over
700r4 with a Transgo shift kit
MSD ignition
Long tube headers w/ true duals
Upgraded sound system w/ subwoofer

Offline VileZambonie

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Re: Changing Throttle Body
« Reply #5 on: November 08, 2008, 02:23:59 pm »
Here's some part #'s for the 350 tbi unit and 305 tbi unit

350

Throttle Body Assembly
      Under 8500 GVW
         Manual Trans 17112497 $1266.41
         Auto Trans 17112514 $1399.64 
      Over 8500 GVW
         Manual Trans 17112511 $1724.14
         Auto Trans 17112508 $1737.76

305

17112484 $386.13
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Captkaos

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Re: Changing Throttle Body
« Reply #6 on: November 08, 2008, 04:26:38 pm »
the only real differences in 305 vs 350 TBI is the injectors.  The same basic model was used on eveything from V6 to 454's.
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Offline DnStClr

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Re: Changing Throttle Body
« Reply #7 on: November 08, 2008, 10:58:12 pm »
Wow Vile. I didn't know they cost that much. I've seen em reman'd on eBay for $350. For $40 it's a good deal.
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Don
87 Chevy Silverado
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