Honestly, IMO I think you're clutching at straws at your size. I also think you're likely looking at too many pics of either recent scars or just scars from people that haven't bothered much with minimising the scars. Also, cameras do tend to make them redder than they really are. I'm only 1 month post op and despite complications, my scars are looking fantastic. They're a little pink but they're very fine and fading nicely. I can only imagine how great they'll look in a year's time. Also, incidentally, my friend was changing in the same room as me for Taekwon-do and he has no idea I'm trans and never questioned the scars. Just asked how I was with regards to range of motion. Not everyone is nosey or jumps straight to thinking you're trans. There's some procedures independent of top surgery, like ops for lungs or tumours that could result in the same scars. Also with them being on your chest and you being a bloke and all, you can easy say, "I'd rather not talk about it, mate!" In a way that implies you don't want to talk about a possible weak spot. I've had folks at work ask what surgery I had having seen my new drain (harder to hide) and I just said it was some surgery on my right chest, nothing major. And no one pushes me for information. And even if they did, so what? You don't have to answer anything you don't want to. I think far too many people assume they have to give people an explanation all the time. We all know top surgery and top surgery scars, but regardless of how much it's out there now well over 90% of everyday folks are 100% ignorant of what those scars mean. And anyway, put yourself in their shoes, how many people are going to push people to reveal more about a surgery after they've answered the first question about it? It's like someone asking what flavour of ice cream you like and you say vanilla. That's your answer. You don't expect that person to start asking why you like vanilla, or what specific brand of vanilla you like, and even if they did, you wouldn't HAVE to say!
Even with all that said and done, if you take care of the scars early on, a lot of people have fine pale lines, easily covered by hair or pec muscles, but barely noticed even without. And most people stop posting pics after the beginning stages of healing. I've seen many top surgery results in person from a year or so on, and you can't tell.
Gynecomastia and top surgery are just entirely different procedures. And very few guys get the type of surgery you're taking about at your size. Nipple placement alone would be a major issue for anything over a B, even more so for a female chest where they'll likely be much lower than a male chest with gynecomastia. Only small Bs at a push qualify for peri for a reason. You're talking fat VS breast tissue.
Get in touch with the doc before you get too excited. I'd be extremely dubious going to anyone who isn't specific to top surgery though. At your size you're also more likely to end up with a DI approach being recommended. I've seen small Bs end up with poor results from peris and several revisions down the line just resigned to having less than perfect results. I couldn't imagine going with someone not specialising in top surgery, at your size, and expecting decent results. It honestly sounds like a disaster waiting to happen so I say tread carefully before you jump into the idea of a multi stage procedure from someone not specialised in that area. In fact I'd go as far to say that just that alone might well be a reason for them to say no.