I have a 76 Eliminator Day cruiser.
A full 4 stringer hull.
Rides like a Cadillac.
Fast? Not so much. Even with 500 HP BBC, it tops out at 57 mph.
I've been thru some serious chop in Lake Mead, and handled it great for a squirt boat.
I've been on the big 3, Mead, Mohave and Havasu, but mostly on the Bullhead Riviera.
Several manufacturers had similar 4 stringer day cruiser hulls. These hills are 40+ years old, and each hull needs to be inspected for stringer and transom rot and delamination.
Spectra, Howard, Campbell, Hallett and many others are still out there. Even a few lesser known names. I'd opt out of the Olds powered boats, FYI.
Good luck with the search.
Dan'l