Originally Posted by lowhirod
I have a 1995 TBI 5.7 truck engine vin K will1996 vortec heads work on this engine ?
They will bolt on but require a Vortec to TBI intake. This will not have EGR ported from an exhaust crossover as it is not cast into the Vortec head. EGR requires external plumbing as was done on the 1996 up Vortec truck engines.
The TBI EFI will be OK with the original cam and rockers for the RPM range of the original engine. Given the computer limits top RPM and road speed you can't really get into problems unless you change the cam, rockers or terminate the EGR. If you do any of those changes you will need a new chip see these people if you do >>> TBI CHIPS
<<<. If you want to rev higher and or increase top speed you will also need a new chip.