Rxp-37-2508 That would officially make her a '66 (duh). One of 45 aluminIum 37 Rivieras ever made. 427s are fabulous motors. The guys over at the Chris Craft Commander Forum are real experts on restoring those babies: Chris Craft Commander Forum Reckon the genset might be an Onan MCCK - another extremely worthwhile '60s era powerunit. (6.5 KW Onan MCCK Generator Start Up - YouTube) Take your time, and keep us posted - you have a real winner there. Cheers! -Eric "Tin Tonic" RXP-37-3501 PS- Marine air fits nicely under aft dinette seat - water hook ups and electric closeby as well.