RHS heads with 1.44" O.D. valvespring?

Most all the RHS I have done have been with dual springs for solid cams or rollers. 1.46" seem to fit good.

The fuzzy pic is of our 2010 MMM engine challenge, it ran Hughes rockers and 1.46 springs, no issues. Ran it to 7800rpm about 70 times on the dyno.