Christie claims to be pro life too. The 2 previous GOP governors, Whitman and Kean, were pro choice. If Christie wins this will throw the pro aborts into a fit (along with so many others!) so for that reason alone it would be good to see him win, even if he has other shortcomings.
My impression is that while Christie may not be as conservative as we’d like, he’s “conservative enough”? About as good as you can reasonably hope to have a chance of winning in NJ. I’ve seen OnTheIssues say that he is pro-life and anti-gay marriage, which says something about him right there.