If you are really serious, try a Ford 302 or six, since they have the oil sump up front -- so does Chysler.

Unless you put a stroker or extensively modified engine in, though, you aren't gaining anything -- the extra weight and low horsepower output from the American engine will give you about the same performance.

A blown 603, though, well, you have to do something, and parts alone are $5000!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!