1970 dart for sale big block $8500 firm

I know its an 8 3/4 because my wifes cousin is a car builder and he is pretty sure that its has a 727 trans and he thinks that its either a 413 or a 440 block. He's confused on the motor because the heads are 4bolt heads! the reason im not answering these questions is because i dont want to say these things and then it turns out im wrong!!! so im not arrogant about it at all!! i think im being honest to a fault i guess! I have a pretty nice car with a big block motor for a really good price! yes the car does have some bondo on the quarters and some on the inside of the doors and the trunk pan will need to be replaced! a few hundred dollars of work and then a decent paint job then you have a 11 or 12 or 13 thousand dollar car, atleast thats what i think from everything else i see for sale out there! sorry for seeming like a prick but im really not!!!!