For Eli Manning, for Ben McAdoo, and especially for general manager Jerry Reese, Evan Engram has been heaven-sent. Heaven Engram. Reese is under fire again for his ill-fated gamble on the offensive line returning intact, and rookie right tackle Ryan Ramczyk, the 32nd pick, has been saintly down in New Orleans. But Reese does not have to apologize for Heaven Engram, the 23rd pick of the 2017 NFL draft. Engram smiled from here to Ole Miss when The Post asked him what he thought about Heaven Engram. “I like that a lot,” Engram said. “I’ve never heard that one before.” Giants tight end coach Kevin Gilbride is looking for Engram to finish blocks better. But with Odell Beckham Jr. and Brandon Marshall lost for the season, the Giants should place a bigger premium on making Engram a receiving weapon. “If you had to compare him to somebody, you’d probably say Jordan Reed,” Gilbride said. “But again, he’s a young player and he’s developing. But the sky’s the limit for him.”