I think you could say the same thing about the datsu.., sorry nissan motors, couldnt you? 4ages love boost, if you lower the compression a little. 4ages are only expensive if you are on the dole, lol. Try and buy a ITB setup for any other motor and it will cost more than silvertop, in almost all cases. Its a very personal choice. Don't forget to see whats legal in your state, or you may flush all your money down the dunny in the end. don't buy parts for a 4age, if you manage to kill one, swap it for another from the importers and part out the dead one. It will cost you 2-4 hundred a motor!