Yes, you do want to use the PCV as its a good thing for your motor. All I did on
my Car was to disable the emissions relay on the firewall by removing the internal
contact. This stops all power to the TCS, and any other sensors as all are powered
by the Yellow Wire. Then I pulled the Vac lines plugged them internally and replaced.
These two things will leave the system in place, but not functional.
I would also leave the EGR in place, just be sure you plug the vac line.
73 and 74 are pretty easy to bypass, and still have an original look. Later Cars
with Converters, and more elaborate emissions systems require more work.
The HEI in your Car could be original as this was available in 74. Just look for a wire
going from the trans to the Distributor (possibly through a sensor on the head as well.)
If the HEI is not getting this extra input, then your all set. regardless, just be sure to
check the Distributor for proper operation, and that it is not receiving any signals from
the Trans TCS switch.
I have a pretty old copy of Thunder Am (Old Trans Am Magazine) that actually provides
a step by step instruction for removing all of the emissions stuff from a later Cars. This
includes how to remove the pellets from the Converter, ect. Can you imagine the trouble a printed story like that would create these days. There is another story in this
mag that covers the whole History of Super Duty Pontiacs. Great reading!
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