Dave here,

Wanted to pick your collective brains on good candidate OM engines for a Diesel Swap on my 76 Scout Terra.

I hear a lot of people talking about how durable the 606 engine is. But I'm apprehensive about putting a 606 into my truck because I flat out do not want any computers in the power train.

Is the 603 mechanically or electronically controlled?

Is the 603 as robust as the 606?

Can the 606 heads be installed on the 603 block?

Are the I5's as good as the I6's?

What do you think of the 617, or 605?