I have a 66 plymouth valiant. The original motor is no good and was wantin to put a diesel in it. What would be the best for this, and how much would it be to buy the engine with wiring harnesses included

 

a 4bt cummins out of a Kobota tractor or a delivery truck would work good. I would use a big block K-member on the front end. A 12 valve cummins would fit but even the big block k-member would need to be reinforced. Both engines have minimal wiring.

 

i was lookin to put something a little newer in it just as a toy