Go Bracket youg man!!!! Add a 150 to 175 outboard and you have a fishing machine!!
There are pleanty of used brackets around if you look hard.
I got one off a 23' Seacraft for $400, New $1600+ With a couple of pt shims on the corners to make up for the curve in the V20 transom it fit perfect!!
I had a 165 I/O stright 6 cyl, Chevy 250, IMO opion it was never never powerful anough for that boat!! So I dread to see what a 4 cyl would do!!
Its not as hard as you think to do, and if you are handy you can do it your self!! I did and have no idea what I was doing!! Been going just fine for 3 seasons now!