Question about 1991 GMC K1500

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Will the computer for the 305 vortec work for 350 vortec motor

Will the fuel system be the same

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  • Anonymous Mar 31, 2009

    no because all the different resistances that the computer outpus for various sensors will be different for the 350

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  • 185 Answers

No. Same Computer, different programming.

-JC

Posted on Nov 13, 2008

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I have a 1997 1500 whit a 305 vortec motor can i put a1998 vortec 350 in it


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What year motors, can I use to replace my blown 1996 305 vortec t.b.i.? I own a 1996 GMC 1500, sl, ext. cab. Does it have to be a vortec for my current computer to work properly? Will engine mounts, bell...


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What year motors, can I use to replace my blown 1996 305 vortec t.b.i.? I own a 1996 GMC 1500, sl, ext. cab. Does it have to be a vortec for my current computer to work properly? Will engine mounts, bell...


Untill recently GM didn't change much of anything as far as bolt paterns You could bolt up a 350 from 20 years ago to your transmission and motor mounts. But that is not really what your wanting to do. The question is do you have a "vortec" or is it TBI. The vortec motor says vortec all over it (they were pretty proud of it I guess) The earlier TBI motor, at first glace look just like the old carburetor versions until you take of the air cleaner and find a throttle body instead of a carburetor. The two are not interchangeable as to the electronics, they are way diffract.

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good idea, use 350 block,305 heads &intake.the reason is, if the 91 305 heads are 4 bolts in center of valve cover the are what you call vortec heads,they have better flow.the tbi will respond better &still have bettergas milage than old style heads.the 350 block will add more overall power.you shouldnt have any problems doing so,you will notice a diff.have fun, good luck.

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