Have a 270 volvo stern drive with a AQ170a 6cl and have the opotunity to purchace a working 270 volvo stern drive but from a AQ130 4cl engine.<br />1]can you interchange the drive parts and use for parts only? Are they the same?<br /><br />2]What if any thing would I have to change/gear ratio/where?<br /><br />3]Would it be worth buying at all? can get for under 200.00 complete.<br /> Thanks Fish