It seems to me there are more rebuilt 1600cc engines available on the market than 1800cc. Is there a reason for this,are they a better engine than the 1800cc or were there just more of then made? The reason Im asking is my Bus has a 1800cc and when I get ready to do the engine work should I use a 1600 or 1800 engine Replacement? And will a 1600 engine fit the transmission in my bus now..Without much of a problem..(74 bus 1800cc single webber carb setup.manual trany) If it were you would you replace your 1800cc with a 1600cc??THANKS jrbo