look datsun's have a good reputation for power/weight ratio...yes displacment is a major factor BUT so is weight!!! time,money and trouble wise the a15 is alot better option!...my suggestion is send a a15 to jts...3200 dollars later the thort of an l-series probley wont exsist!...is it really worth the trouble to go hunting for a few extra cubes when also weighting ur little car down?...i gota mild a15 and it makes modern v6's look stupid