RHS heads with 1.44" O.D. valvespring?

MRL Performance said

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.

Click to expand...

Hey Mike, thanks for responding!

Couple of questions for you- did you have to open up the spring pockets to fit those springs, or were yours already cast to fit the wider O.D. spring? Looks like there are locators under those springs

Are you spring pads machined down for a taller installed height? What was the installed height you were running?

And with the Hughes rockers, 1.5 or 1.6? Shims under the shafts?

Sorry for all the questions, just trying to get a clearer picture of whether I will have any issues?

Thanks!
Matthew