B buckshot923 New Member Sep 14, 2003 41 0 0 Jan 30, 2004 #1 Jan 30, 2004 #1 What are the stock valve sizes on 66 289 heads?
1320stang Founding Member Nov 13, 1998 4,329 23 89 Edmond, Oklahoma Feb 10, 2004 #2 Feb 10, 2004 #2 I believe they are 1.78/1.45, according to Fletch's 5.0 head flow page.
L Lswhat New Member Feb 9, 2004 126 0 0 Orlando Feb 10, 2004 #3 Feb 10, 2004 #3 yeah that sounds right because i belive the wf head is 1.86 1.54