Eye Soo Zoo...
We had a mid 80's Chevette "Scooter" for a delivery vehicle at one of the parts stores I worked at..it had the Isuzu diesel motor ..cant recall if it was automatic or a five speed,I only drove it about 3 times,as I was a counterman 99% of the time..it had 250K on it,and it was highly prized by my bosses father,he drove it all the time,even took it home and used it instead of his own car!..it got over 30 mpg,and I don't recall it ever having anything go wrong..might be the same motor the Isuzu trucks and S-10's used later on..
It got T boned at a bad intersection though...they still got 800 bucks for it after buying it back from the insurance company..a local cranberry grower bought it for the motor,to use on a bog pump!..many VW diesels are pumping water in and out of cranberry bogs here too..one guy I know has an old scout with a six cylinder Nissan diesel pumping his bog water..
Though a 4.3 Olds diesel would bolt into an S10,I don't think its a worthwhile effort..those motors are the little brother of the ill fated Olds 350 Diesel..by like transplanting a time bomb into it!..I's go for the Isuzu or a 4BT Cummins from a bread truck..
I saw one getting sold from a Grumman "P" series with a TH400 attached for 1000 bucks a month ago,at a local junkyard..the guy who bought it scrapped
the aluminum body,got 500 bucks for it!..then hauled the rolling chassis,complete with brand new springs,michelin 19.5" tires,and a dually rear to Maine,where he plans to swap it into a GM crewcab.
It would be a lot easier to just buy an ols Nissan or Toyota or Isuzu diesel truck in your case though..good luck finding a cheap diesel now,the prices skyrocketed since gas prices went up around here...
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