Holy Crap,I spent my hard earned $$$ buying not just 1 set but 2 sets of 572-13 heads,when I could have save $$$ by using 440-1 heads I just let 1 set go with my spare engine,but you can bet the farm on this I won't be replacing them with a set of 440-1 heads.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
I just let 1 set go with my spare engine,but you can bet the farm on this I won't be replacing them with a set of 440-1 heads. 
