Re: 1978 OMC 225 V8 to 1978 235?
There is no such thing as a 1978 Electric Shift. 1977 was the last year for Electrics at OMC.<br /><br />If the drive is 1978 it's hydromechanical shift or has been converted since to full mech.<br /><br />If they're both pre-1978 units, as long as they're both High Profile, they should be the same drive.<br /><br />1976 was the last year for a "225" which was a 305 Chev.<br />In 1976 and 77, OMC offered the 235, which was a Ford V8<br /><br />both used 1.16 ratio drives as Kieth was saying, compatible there.