It's a 1975 Glastron Carlson CV-21. The grab rail that goes back to the swim platform is unique to a 75. 74 and earlier the grab rail wrapped around the rear deck. In 76 the CV-21 was replaced with the CV-23 like Diamond Jim has.
It'll be a nice ride restored. I have three boats here now. I would love to own the cruiser, but my wife would kill me if I brought another boat home for free, let alone pay for it! LOL
And YES, it's a jet with most likely an E pump. Probably Olds power also.
The 75 Carlsons. http://www.classicglastron.com/75gl-carlsons.html
The 74 Carlsons. http://www.classicglastron.com/74gl-carl-cv21.html