If all you want is 70's or 80's I would stay away from blowers and associated headaches. I have a 21' Daytona with a normally aspirated 572ci Chevy and AT pump with AA impeller that will run 80's all day long on pump gas and has been reliable. The motor was built by Britt at Nu Tech automotive in the San Diego area, I can get his phone number if you are interested. Don't worry in addition to 2 Jets I have an Outboard and an I/O as well but given my choice I choose the Jet all the time to take out.