Was dennis lillee a medium pacer?

Also a handy spinner. In a Test in England he wanted umpire ie Bird to change the ball during an over because it was damaged out of shape. Umpire refused and Lillee said he would not finish the over. But Chappelli (his captain) told him to "get the **** on with it" (or words to that effect!). So DK said "OK, but I'll bowl spin..." After completing the over ie Bird said to Dennis, "That was pretty good, you've got a career as an offie if you ever decide to give up pace bowling!"