Buying My First Muscle Car 1973 Duster 340 Interior Pic

Yes, I just really want to know what I'm buying. I'll be going alone and not feeling very confident. At the moment, I'm thinking I'll be looking up all these numbers somehow on my cellphone or something
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I just Googled Mopar block casting numbers. There's a block with the cast number for a 360. Get yourself familiar with this kind of stuff. Someone showing a 318 or something like that for 340 price that stuff needs to be checked. Don't wear clean fancy clothes be ready to Roll On The Ground underneath that stuff. remember on the driver side above the starter underneath the exhaust manifold you're going to have to get under there. Turn the flash on your phone and take a couple pictures and look at them and blow them up. bring a rag and a screwdriver if you have to get up there and scrape a little bit if it's oily or greasy which it shouldn't be. The motor looks pretty clean.