When the intestine monster first jumps at Ash, it uses the same sound effect as the alien in the blood-test scene from "John Carpenter's The Thing" (1982).
When Ash's father is watching TV with Lillian, "Spartacus" is playing, which starred Lucy Lawless. It was also produced by the team that produced this show Sam Raimi & her husband Rob Tapert.
About two minutes in, Brock (Lee Majors) taunts Ash about his bionic hand. Majors played the bionic Six Million Dollar Man.
At 13:37, Ash says "What the Harryhausen?". Ray Harryhausen was a creator of the stop-motion model animation known as "Dynamotion". The first of his many films was "The Beast from 20,000 Fathoms".