1975 and 1979 Johnson 20 hp

[41 Keys]

Good day. I have a 1975 Johnson 20 hp model 20 BA75B. I have a chance to grab another Johnson 20 hp model 20 CR 79 R. My question is are the parts of the two motors interchangeable? Is it a good idea to buy the 1969 motor anyway?

 

[flyingscott]

75 and 79 are different motors. The 75 is a 22 CID block the 79 is a 32 CID block. Not much in common