Mike...Sideshow...mea culpa, I stand corrected. I was speaking from the position of an American Ford 302, and like a complete wally, didn't read that you were talking about an LS1. I shall remove my Americanized pommie a$$ from this thread and apologize for interfering in Antipodean threads!
Forgive me, I was trying to help!
Regards and good luck
Glyn