crane cams springs

[-=Red5.0GT=-]

hey i'm going to install some crane cams springs (part # 44308-1) in some iron gt40 heads. i'm wondering if anyone knows how much lift they can handle?

 

[2000xp8]

hey i'm going to install some crane cams springs (part # 44308-1) in some iron gt40 heads. i'm wondering if anyone knows how much lift they can handle?

I believe these are the springs in the kit, so looks like max lift is .580
Don't be fooled by the description, look below they are for a ford not chevy. Cranes site sucks.

http://www.cranecams.com/index.php?show=browseParts&action=partSpec&partNumber=99841-16&lvl=3&prt=122