Did Curtis do any more horror flicks besides this one which aren't in the Macabre Collection DVD set?
One that I encourage you to see at least once is
Scream of the Wolf. You'll get Peter Graves and JoAnn Pflug, a Richard Matheson script, a touch of suspense every now and then, some unintentionally amusing scenes, 70s flashbacks (!!), and James Storm (!). (Other DS moments include the oversized small-town police force and their mysterious use of windshield wipers when there's no rain in sight, hee.) Though some might, I can't say I recommend you purchase the DVD, but SotW is fun to catch when it shows up on cable.