What are the differences between an 87' 305 TPI intake manifold and an 89' 350 intake manifold? What accomadations would I have to make to fit it on my 350? I know the 87' has a cold start injector and mine doesnt but that is the only difference I know of. I want to buy the 87' so I can have some port work done to it and I wont have any down time of not having one on my car. Also, what is a good cleaner for getting off all that black stuff on it?
Thanks in advance

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89' 5.7L TPI Auto IROC American Racing Torque-thrust 2 rims ,
Flowmaster, high-flow converter, SLP headers, B&M console megashifter, MSD 6aL, airfoil, K&N's, Bosch Platinum +4, 8.8 wires, blah blah

 

The 87-92 intake manifolds are identical. Its the runners and plenum that you'd have trouble with. There's also no difference between 305 and 350 TPI stuff, except the injectors are 19lbs for 305 and 22lbs for 350.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I thought there was a "9th injector" in the 87-88 manifolds?

 

Kevin is right, the intakes are the same. The 9th injector is actually in the driver side runner. It would be here in 85-88 cars:



The following pic shows where the fuel "would" go in the manifold, but it is simply plugged off by the 89-92 runner.



Sorry my arrows are not as straight as Vaders.

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1989 IROC-Z 5.7L

 

Does the 89-92 runners also plug off the "9th injector" hole on an 87-88 plenum?Thanks for your help Omar and Kevin, both of you helped me out alot and I thank you for it.

 

Yes, Omar's pic is of an 89-92 runners, and you can see it will block off that hole in the intake manifold where the 9th injector would be.