There was a post on here some time back where a guy posted a website of a late 90's early '00 chevy 1500 with an isuzu turbo diesel getting over 30mpg. The motor swapped right in. He just had to weld up new frame mounts.
I'd love to put a 4 cylinder isuzu turbo diesel into my isuzu rodeo with the 5 speed.That sucker would be awesome. Im getting a little over 27mpg when i keep it at 55. Imagine what that diesel would get doing 55?
