A B737-300 ELEVATOR TRIM TAB MANUAL REVERSION CHK AND ADJUSTMENT WAS ADJUSTED USING THE B737-700 PROCS.

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ON AUG/THU/03 APPROX XA50; I PERFORMED A TEST FLT ON ACFT. IT WAS REQUIRED DUE TO ELEVATOR TAB R&R. DAY SHIFT COMPLETED ELEVATOR READJUSTMENT AFTER IT FAILED THE FIRST TEST FLT. THEY TURNED ACFT OVER TO SWING SHIFT. ONLY ITEMS LEFT OPEN WERE AN EYEBROW WINDOW AND TO CORRECT RIG ON AILERONS (PLANE WAS ROLLING TO R DURING TEST). MYSELF AND ANOTHER TECHNICIAN CORRECTED RIG ON AILERONS; THEN ASKED TO DO TEST FLT AND WAS HANDED PAPERWORK AND TOLD THAT ONLY 2 TURNS OF TRIM ON ACFT WITH TITANIUM RODS. PERFORMED TEST FLT; CONCENTRATING ON ACFT AILERONS. NO ROLL; FLEW GREAT. THEN I PERFORMED THE MANUAL REVERSION FOR ELEVATOR. ACFT TOOK SLOW NOSE DOWN ATTITUDE. WE TRIMMED FOR STRAIGHT AND LEVEL FLT. SHE TOOK 9 TURNS; I WAS THINKING TRIM TO NOSE DOWN WAS MY 2 TURNS; AND TRIM TO 19 R TURNS WAS MAX; SO 9 TURNS...WILL PASS. IT WAS NOT TILL NEXT DAY GOING TO WORK IT CLICKED THAT ACFT WAS A -300; NOT A -700. I PERFORMED TEST FLTS ON -700 EVERY WKEND FOR THE PAST SEVERAL MONTHS DUE TO ELEVATOR R&R'S. SO I HAD TO GET ACFT ON GND. GOT TO WORK AND TOLD TECHNICIAN. WE NOTIFIED MAINT CTL PER ASAP PROCS; THEN I MADE THE CALL TO ASAP.