Firm feel stage 2 to 3 difference

[426cudafish]

Thanks for reponses to re-inforced K-frame and upper tca's 
I have power steering and already have Firm Feels stage 2 rebuild and wanted to know whether it's worth going to stage 3 for better handling?
They also have longer fast ratio pitman and idler arms, but will they clear the 1 7/8 inch TTI headers?

[Chryco Psycho]

I have never tried a stage 2 & 3 on the same car to determine the difference

[brads70]

On firm feel's website they say which headers the longer pitman/idler arms fit. For big block TTI headers won't fit. I didn't look at small block?