Thanks for the replies, I've done a little research and the boss, un-cut in stock form measures about .990", the I.D. of a stock spring is approx. 1.020", about .030" clearance.
The spring I will use is a Comp Cam 911, which has an I.D. of 1.125" approx. .135" clearance. And I read in the mopar engine books and they refer to this boss as an inner step. So I'm thinking this boss does not locate the I.D. of the spring and prevent side movement as I was thinking. As long as the spring doesn't interfere with the step, I should be fine? And if the boss has been removed it should not be a problem?