same thing happened to me. I was at 510 rwhp 550rwtq with my ported eaton. 2.8 upper 4lb lower. we didn't have e85 back then. The car felt slow bc we get used to it, and these blowers get hot. One pass and its dead. And when your young, you always have something to prove and want to be the quickest. Back then it was a bit easier lol Now its hard to keep up with all these newer faster cars on the road. your kb swap will be fine.I’m at 500w right now and honestly it is feeling slow to me. Don’t get me wrong….It is a lot of fun to drive. I get a lot of looks and compliments. I am keeping all my parts as I’m currently installing a kenne bell. Maybe I’ll go back to stock-ish setup but I doubt it.
I know what you’re saying though. I am the type of person to regret a lot of my decisions so I’m sure I’ll be where you are at some point…time will tell.