THATS A TUFF ONE, I HAD A 1969 FOR 25 YEARS.
YOU HAVE A 1/2 TON WITH NO FRAME,
THE MOTOR MOUNTS CANT BE MOVED...BECAUSE IT USES A UNDER SLUNG CROSS MEMBER...
AND YOU HAVE ONLY ONE BOLT TO HOLD THE TRANS.
THE "DOG HOUSE " IS TOO SMALL... ,
THE SPRNGS ARE NOT ALL THAT STRONG,2 LEAFS ARE NOT ENOUGH TO HOLD UP THE WEIGHT OF A DIESEL MOTOR & TRANS.
I THINK THE ONLY DIESEL MOTOR THAT YOU HAVE A CHANCE OF FITTING , WITH OUT A HECK OF A LOT OF FABING....,
WOULD BE A OLD "GM" V8 TYPE DIESEL .
YOU WOULD NEED TO USE YOUR TRANS, AND MOUNT.....BECAUSE OF THE LACK OF A FRAME....
THE ONLY THING YOU GOT ABOUT RIGHT IS A GEAR RATIO...OF 2.73...... AND REGULER SIZE TIRES...??
THE DRIVE TRAIN IS NOT ALL THAT STRONG...10 BOLT...gm...??
UNLESS YOU WONT TOO DO A LOT OF FABBING,...... LIKE A STEEL SUB FRAME , 12 BOLT AXEL AND MORE SPRINGS ...ECT..
THE OLD V8 GM DIESEL IS THE ONLY THING THAT WOULD COME CLOSE ,
IMO......SORRY