If the Jets are going to trade Darrelle Revis — and the noise is growing louder by the day that they will — they must fetch no less than a first- and third-round draft pick for him. That was a consensus from several NFL scouts The Post spoke with on the condition of anonymity at Wednesday’s Rutgers pre-draft pro day inside its practice bubble. “Two first-rounders and a three; that’s what I would be asking for,’’ one NFC scout said. “For Keyshawn Johnson [the Jets in 2000] got two No. 1 picks and with Revis we are talking about the best defensive player in the league.’’ Another NFC scout said, “They have to get at least what the Vikings got for Percy Harvin,’’ referring to Minnesota getting a first and seventh-rounder this year and a mid-round pick in 2014 in its trade of Harvin to the Seahawks on Tuesday. There was split thinking among the scouts about when a Revis trade might take place. There are some who believe the Jets are so desperate to get something for Revis before he bolts as a free agent after 2013 they might cave before next month’s draft and settle for compensation below market value for him. This, of course, would be an immediate indelible stain on new general manager John Idzik’s record — hardly a way for him to ingratiate himself to Jets fans who already are irate at the state of the team. There are others who believe Idzik, known in league circles as a conservative, patient man, will take a deep breath and allow the process to play out into the season — let Revis return in training camp and play into the 2013 season to see that he is still the same dominant cornerback he was before he blew out his knee last September.