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Hey all, I have my 98 motor (150k) on the stand right now and pulled off the intake manifold. I noticed a lot of oil sludge in all the intake ports of the head (enough to scrape off with a spoon) so I decided to separate the intake in half to try and track down the culprit. To my surprise I...

For a full street NA build would OBD1 or OBD2 be a better choice to start with? OBD1 seems to except mods easily but vvti seems to be a plus. Will also be running a MAP ecu.