Re: johnson controls
Shop.evinrude.com doesn't show an 8hp model for 2002 - are you sure of the make/year?
Also, assuming that your Glasstron is about 14' - 15' in length, an 8hp motor isn't going to be enough power for it to even plane. I think you would be better off forgetting the controls and going to a larger engine. You don't have to get rid of the 8hp motor, however. I would keep it as a "kicker."