Jason , I had one of these cars ,, '70 280S , you say it is a 280SE ,, the E is for injected , so if it has carbs , then ........whats up ?
Nice cruiser , carb model thirsty , check very closely for rust .
Mine was a manual , great to drive , worked wonders putting new shocks on it .

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'72 240D
'76 300D
'88 300sel
'40 Chev pickup , the shop hack.
'73 Monte Carlo Landau, for "Super Chevy Sunday"