Does anyone know what engines are swappable in the J series trucks?  Specifically a Ford 400?  I realize that with enough time and money anything is swappable, what I am looking for is how much of a project would I be getting into.  Any help would be appreciated.

FIRST THING FIRST WHAT DO YOU WANT TO DO WITH IT 2ND WHAT YEAR &WHAT  RUNNING GEAR DO YOU HAVE ALL READY  3RD  HOW MUCH MONEY DO YOU WANT TO SPEND   CAN YOU WELD ? DO YOU HAVE A DONOR TRUCK  THESE ARE ALL THING YOU NEED TO THINK OF  THEN I WILL BE ABLE TO HELP YOU I DONE ALL KINDS OF SWAPS MY LAST GREAT ONE WAS A SMALL BLOCK CHEVY IN A 1984 VOLVO 740 THAT CAR FLEW I WILL BE GLAD TO HELP YOU OUT ALSO ADVANCED ADAPTORS CAN HELP A LOT

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DRIVE IT LIKE YOU STOLE IT!!!!!!!!!!!!!

I guess basically I just need to research what running gear the J trucks came with.  I have a well built 400 in a 78 Bronco.  What i need is a truck and i just like the body style of the J trucks.  It would make more financial sense to find a 78-79 ford truck.

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In the end we are all just chalk lines on the concrete.