InformativeFrom memory I want to say that the LS1 block off plates fit.
LS EGR Exhaust Block Off Plate
As featured on Classic Truck’s Week to Wicked. Watch the transformation here! These EGR exhaust block-off plates are intended for use on non-pollution controlled, off-road vehicles only. For GM LS engines Hardware and O-ring are included Measures 1-3/4" center-to-center on bolt holeswww.speedwaymotors.com
Do you have any recommendations on my other post on more importantly eradicating Moreless deleting the air pump system from the PCM? I mean the CEL light is on and will be on regardless if I remove the lines and pump . That way if my cel ever comes on I know it’s for A new issue obviously. Can a shop speed shop or a program flash that away ? Or would you say just swap pcm from a 98-99 Non smog Chevy with a 5.7L