So I am 27 years old and for the longest time I have been trying to think of his movie but the only thing I can remember is a couple of scenes. Well I'll try to explain them and hopefully you will be able to help.
So the things I remember is that it was made in the early 80's. The plot (that I remember) is that 2 guys were staying in this house and they went through a secret passage and find another world (?) Also there was a character that is their dead uncle (Uncle Jesse?) and he wore overalls.
Also I remember them finding a crystal skull.
I don't even know if it's a movie or not. All I know is that I haven't seen it in forever and not knowing the name of it is absolutely killing me.
That would be "House II", I think.
Def. "House 2"
And a review!
http://www.badmovies.org/movies/houseii/
I will be the fourth (including Andrew) to confirm HOUSE 2. Royal Dano played the undead Uncle. Here's some images of him:
https://images.search.yahoo.com/search/images?p=HOUSE+2+ROYAL+DANO&fr=mcafee&type=E211US1456G0&imgurl=http%3A%2F%2Fbasementrejects.com%2Fwp-content%2Fuploads%2F2018%2F07%2Fhouse-ii-the-second-story-1987-gramps-royal-dano.jpg#id=-1&iurl=http%3A%2F%2Fbasementrejects.com%2Fwp-content%2Fuploads%2F2018%2F07%2Fhouse-ii-the-second-story-1987-gramps-royal-dano.jpg&action=click
Alas, no confirmation from O.P., as sadly is so often the case.