Good Glass work!!
I took a while to decide but I left the old I/O cover in the boat, it was great for cutting bait and such, also for sitting while jigging.
Also I added a 25 gal gas tank which increased my 40 gal to 65!
Also keeped my bait well under there unless I wanted to use it, I just take it out and I was ready.
Not sure what year yours is, but the old 75 had saddle bags and the boat would list to the side with the most gas, By putting the tank in there it kept the boat level all the time.
I got my bracket as a take off from a marina $400
It came off a Seacraft which has a straight transom and the wellcraft has a curved one, so I made shims out of PT 4x4 worked great