Hey I just recently purchased a '72 240Z. It has had some work done to it, like a rebuilt top end, electronic distributer, and DGV Redline carburettors. My question is, what is the maximum SAFE RPM I can rev it to? I know it yellow lines at 6k and redlines at 7k. Just wondering, I really don't want to blow it up, the whole lack of rev limiter thing scares me.