That's a good deal Dan, I paid 750+taxes from Mike when at HC and that was a great deal,
hope the tank isn't butchered too bad as you have to cut them to your hull angle, if it is you can buy a new tank, I used marine silicone to stick mine down in a test spot and its been like that for over a year now

, make sure whatever spot you pick that you grind off any paint and have a nice smooth surface to mount to, this tank is huge I think your going to be surprised, its like 6"X9" and ducer weighs 13 lbs I think

, use RV antifreeze to fill the tank, NOT mineral oil as suggested on other sites if you do use silicone
it doesn't say what plug end it comes with it either
so you may have to buy the lowrance end, its a 2 piece cable so no big deal.