Notch my transom?

[CT_V-20]

Okay, this would be a significant modification and go against all of those looking to add a bracket to their V-20s, but here's my situation: 1) I am underpowered w/the 1.6L Sea Drive and this will be its 20th season (bless it's heart), 2) I would like to repower, 3) I have a slip that I don't want to lose and it's for an LOA up to 22', 4) a new bracket will put me too far over the 22' LOA to keep my slip, 5) I love my hull and I don't want a new one. So, I am seriously considering losing the Sea Drive, having a glass shop cut a notch in my transom and hanging a new 150 (just visited w/the local Yamaha dealer) back there. That way I can keep my boat, keep my slip and keep up with my buddies on the water. I'm looking for feedback on this project. Also, I'd be interested in hearing opinions on four-strokes vs. carbs. With the Yamaha F150, which weighs 466 pounds, my hull and motor would still weigh less than it does with the Sea Drive. 1920 + 466 = 2386# vs. 2546# with the Sea Drive. The carb 150 is 108# lighter than the four stroke. After tonight I'm not going to be able to check this thread until Friday A.M., but I'm interested in all of your opinions.