JOE, PHS IS INTERESTING AND WELL WORTH THE $50, BUT IT WILL ONLY TELL YOU WHAT ORIGINALLY CAME FROM THE FACTORY. SINCE YOU ALREADY KNOW THAT THE ENGINE WAS REPLACED, YOU NEED TO FIND THE CODES FOR THAT ENGINE AND POST THEM HERE. I'M SURE ONE OF US CAN TELL YOU WHAT YOU HAVE WITH THAT INFORMATION. LOOK ON THE FRONT OF THE BLOCK FOR TWO LETTERS STAMPED FAINTLY THERE, JUST BELOW WHERE THE HEAD JOINS THE BLOCK ON THE PASSENGER SIDE. EXAMPLE "WZ" "YS" ETC. ALSO ON EACH HEAD, WHERE THE CENTER TWO EXHAUST PORTS ARE SHOULD BE TWO OR THREE NUMBERS CAST (RAISED) THERE. EXAMPLE "670" "17" "42" ETC. THESE WOULD BE HELPFULL TOO........JOHN