i have a 1977 70 hp evinrude that needs a lower unit<br />i also have a 1975 50 sizzler that needs a power pack<br />both are mechanical shift<br />the castings appear to be the same when held side by side ( the 70's is off the 50's is not)<br />are these possibly interchangable?<br />i am under the impression that the sizzler is the long shaft version of the fifty hp
