Offset valve spring retainers or keepers ?

The comp catalog calls out max lift as .49 If i can go to bind numbers then no problem
Lets' make sure we are saying the same thing.... you cannot go to coil bind. You have to maintain at least .060" to coil bind. Which is why I went through the numbers; if you get that 1.650 installed height, then with a 1.100" coil bind, then you have .550" to play with. and the .490" lift works.

BTW, I 2nd the Voodoo suggestion. Is this a bone stock 360 LA bottom end?