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andyh1956 · 01-11-2018, 12:56 AM

If you want to replace the heads go with the Vortec heads & a new GM Vortec / TBI conversion manifold.
Our 88 K5 Blazer has a Comp Cam for a TPI engine that runs well w/ no computer mods.
Put some flat top pistons in there, a heated O2 sensor & a set of headers as well & it will run pretty good.
Here's some more info
http://tbichips.com/?page_id=73

01-11-2018, 12:56 AM	#2
andyh1956 Registered User Join Date: Mar 2010 Location: thomastown mississippi Posts: 1,261	Re: 87 tbi upgrades If you want to replace the heads go with the Vortec heads & a new GM Vortec / TBI conversion manifold. Our 88 K5 Blazer has a Comp Cam for a TPI engine that runs well w/ no computer mods. Put some flat top pistons in there, a heated O2 sensor & a set of headers as well & it will run pretty good. Here's some more info http://tbichips.com/?page_id=73 Last edited by andyh1956; 01-11-2018 at 01:03 AM.