I just bought a 66 shortbed with a tired 240 six in it and a 4 speed, I found a running 300 six out of an 84 van that has a 4 speed, will the 84 300-6 fit into the 66? will there be any wiring, bracket or other issues I need to know about? is the 84 a good year of the 300-6? any help would be appreciated. Here's a picture of the truck.