Override Parameters

//JOB1 JOB 1,'MAHA'
//MYPROC PROC
//STEP1 EXEC PGM=IEFBR14
//DD1 DD DSN=KC03H09.M67.M7,
// DISP=(NEW,CATLG),
// SPACE=(TRK,(5,2,0)),
// DCB=(RECFM=FB,LRECL=80,BLKSIZE=800)
//SYSPRINT DD SYSOUT=*
// PEND
//STEP3 EXEC MYPROC
//STEP1.DD1 DD DCB=(RECFM=FB,LRECL=80,BLKSIZE=6400)
//SYSIN DD *