Compression was higher, different cam, more efficient valve angle. The power curve was slightly higher, this motor pulled to 7K. Duster ran 13.90's stock with just carb and distributer tuning. That's with 3.55 gears.
Rick
98 Red CSVT #6 of 6535 Born Nov. 12, 1996
02 Jeep Liberty Limited
79 Datsun 280ZX w/ 355sbc
