454 TBI for 350

[Walter Sherwin]

>I have recently acquired a throttle body for an 89 GMC pickup with
>a 454 in it.  I plan on using it on a 76 Chevy 350 in a 1/2 ton 4x4.  I
>don't know if I could use this throttle body using the bin for a 350
>engine or not.  Hopefully I will be receiving a programmer so I could
>reset some values but don't know what to reset to.  I am certain
>that the injectors will flow more fuel than is needed during normal
>driving but will need that extra during WOT because the throttle
>body flows more air also.  I could use some expertise on this
>project.  I will be using the well known 7747 computer.
>



I just got home from a marathon injector testing spree, on a friend's
injector flow bench (what a coincidence).  Your 89 454 TBI probably has two
injectors marked either 5235231 (service part number 17111784) or 17084304
(service part number 17112560)???    You would save yourself a lot of
programming headaches by switching to a good 350 TBI injector like the
5235206 (service part number 17112493).  Don't worry about the additional
top-end airflow from the BBC TBI casting ontop of your SBC.  You can deal
with that through the program.  Of course my friend said I seemed "high"
after 6 hours of fumes, so take this for what it's worth :)

Walt.