It would take some pretty complicated machine work to bore passages in the heads for egr and air pump provisions. That machine work would likely exceed the cost of upgrading to heads that already have smog provisions. We offer many other popular aluminum cylinder heads for your 5.0 that have smog passages. At this time, we don't have plans for SVE heads with smog provisions. On a fox body, removing the smog pump and its plumbing (although not legal for road use) will not typically turn on the check engine light.