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**71swb4x4** · 04-27-2004, 10:41 PM

I am working on a TPI swap now. I bought an 86 IROC for $400. That way I have absolutely all of the sensors. 87 and up have a different angle on the center bolts on the intake, so you have to modify the angle slightly so those bolts will go into older heads correctly.
If you are planning to go with more cam I would get it up and running before you swap the cam. That way you can get any bugs worked out before you modify, so if there is a problem you can isolate to the new cam.
I have used the info on the site that Botboy referenced. The wiring differences were a great help.

Shawn

04-27-2004, 10:41 PM	#8
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,499	I am working on a TPI swap now. I bought an 86 IROC for $400. That way I have absolutely all of the sensors. 87 and up have a different angle on the center bolts on the intake, so you have to modify the angle slightly so those bolts will go into older heads correctly. If you are planning to go with more cam I would get it up and running before you swap the cam. That way you can get any bugs worked out before you modify, so if there is a problem you can isolate to the new cam. I have used the info on the site that Botboy referenced. The wiring differences were a great help. Shawn __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.