Yes I see where your coming from, been there in my young gun days and built a couple of slant sixes....... Found in the long run for power it was cheaper to either start with a v-8 or do a v-8 swap. It's ultimately up to you but I'd use the opportunity to do a V-8 swap. And if you really want some fun turbo that baby up. However there is something good to be said about being different.....
Lol! To beat the novas........ Not sure how many you've run across but I bet they were the standard 250 six or the 350 v-8 ones..... In addition to my Mopars I have a 69 Nova SS with a 500 cubic inch big block stroker (455 block). It's pro-touring setup. I doubt you'd be able to keep up....... It's not all chevy though. The entire drivetrain is modified Pontiac GTO stuff. Couldn't bring myself to do a chevy 396 small block. At shows it confuses the chevy Guys as it looks like it's supposed to be there but all the accessories are on the opposite side including the fuel pump. The ones who do figure it out sometimes get angry and I just laugh.