IS IT 19.5 OR 20.5

[RIRED]

MY BROTHER HAS JUST PURCHASED A SEACRAFT CC BUILT IN 1975 THAT HAS BEEN TOTALLY REDONE. THERE ARE NO MARKINGS ON THE HULL AND THE TITLE HAS NOT BEEN TRANSFERRED. WHAT A GEORGEOUS RIG! THE OWNER CALLS IT A SEACRAFT 20. I NOTICED ON SEACRAFT'S WEBSITE THAT THEY NOW OFFER BOTH A 19.5 AND 20.5 HULL. I WOULD LIKE TO KNOW IF SEACRAFT OFFERED BOTH SIZE 20'S BACK THEN, AND IF NOT, WHICH VERSION DID MY BROTHER JUST BUY?

THE BOAT DOES NOT HAVE AN OUTBOARD ENGINE OR TRAILER. WHAT SHOULD HE DO FOR THOSE?