Hey Everyone, Would like to ask for some help, please. I just picked up a 1989 D-100 (3.9l v6)and have a D-150(318ci) sitting in the driveway. I would like to swap engines but I am having trouble finding wiring diagrams for each year. I want to make sure I can simply remove one from the firewall and plug it in the other before I start the swap. Any help or tips would be welcome. Also does any one know if the cat for a v6 is different then for a v8? They look identical and I can't seem to locate any numbers, etc. on either. Since I plan on running headers, having two cats ready to go would be great.

Thanks so much!

 

Sorry, I didn't give the year of the 150 , it is a 1988.....