HOW ABOUT A 1979 318 V-8 IN MY '73 SCAMP?

Hello everyone, I'm the guy that keeps bouncing back and forth between this engine and that engine to swap out in my 1973 Scamp with 225 slant 6. I just found a guy that lives 15 minutes from me has two 340's for sale! He says they are rebuildable 340 motors complete from oil pan to intake. No carb, all pulleys are on them. He further says he has a '70 motor and a '72 motor. What should I ask him for as far as numbers or pictures or whatever to make sure it's a good deal? Do I ask for the '70 or '72? I have never purchased a motor except a VW 1600 and I know what to look for with those! Should I go look at them, I really wouldn't know what to look for even if I was there. His asking price is $1000 per motor. Please help me out here, I would really like to have a 340 in my Scamp! Thanks P. S. IF someone would like the leftover motor? It's located in SW Oklahoma.