3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

87 iroc 305 tpi -to- 350

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Old Nov 13, 2006 | 11:08 AM
  #1  
slowpoke310's Avatar
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87 iroc 305 tpi -to- 350

will a any 350 sbc 1pc rear main bolt right in the 87 iroc?
will the tpi mainifold fit right on
Old Nov 13, 2006 | 12:41 PM
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Everything will transfer over except the fuel injectors (need 22#) knock sensor and new chip for the ECM.
Old Nov 13, 2006 | 01:44 PM
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This car will run fine even w/ the small injectors and 305 chip,i ran my 350 like that for a while with zero problems in my old 87 IROC. Not even a year after that I actually wanted some power so I ditched the TPI and went carb'ed w/ heads/cam/stall and gears. The L98 ran good dont get me wrong,it just wasnt powerful enough for me.
Old Nov 13, 2006 | 01:54 PM
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thanx guys, its more or less what i figured & thats what ive been told.
im just building one for one of my club members but he wants to keep tpi & do as little fabricating or changes. im just building the long block 355, mild cam, little extras. but want 2 be sure when they put it in all is going to bolt right up.
Old Nov 13, 2006 | 02:12 PM
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Yea man,everything is pretty straight forward.

Not sure if youve pulled a motor in a 3rd gen before,but if you havent watch out for the AIR crossover tube that goes behind the motor and the ground wires/straps on the back of the heads...( I know for a fact theres some on the pass. side but cant remember about the driver side,this was 5 years ago for me lol).
Old Nov 14, 2006 | 12:20 AM
  #6  
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Just make sure you don't get a Vortec or Fast burn head engine or the intake won't work. Of course for around $400 you can get a TPI Vortec intake from Scoggin Dickey.
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