I just installed a cloyes aluminum timing cover with no timing pointer on my 327.  My balancer is a 6 1/16. I've been looking at the timing pointers on Summit. There's 6 inch, 6.125 inch, 6.25 inch pointers. There's a way better variety in the 6.25 category. Will the 6.25 inch work or do I have to get the 6 inch one?