273 or NOT 273?

I'm talking to him Saturday. Bringing my 340 block by and he's going to check it out. I will pick his brain but I'm pretty sure he's going to ask why , if my 340 block checks out , I should build that. Lets face it , my current 340 in my car is faster than the 273 I'm looking to build. I think I'm trying to be that different guy but in reality , I'll just build my 340.
Hard to argue against a 340.