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I have ran , RPM , vs stock heads, My friends have run (still does) rpms, and a set of the Pro comp victor jr knock offs, full cnc port job, flow of @ 340s350s @620lift, the rpms flowed 291,
my question is, I have watch him switch heads off the same motor, put 1.6 rockers instead of the 1.5 and saw no pick up??
I have RPM heads now but will be building a 500 cu over winter,,
he has ran a 500 cu with both sets of heads with no improvement,
why would I switch heads if there is no pick up to be had with set of $2200 and bigger rockers at cos of $400??
Is there enough pickup in say the Indys over other such heads???
Knowing that Indy heads would be over 3 grand!! is there enough pick up to justify??
My thinking now is no , unless I want to push the RPM of the motor thru the roof??

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Like Billy, said, what do you want to do? Whats your car run now and how much quicker do you want to go? What's your current buildup??

By your post its obvious you have a lot to learn and there's a lot of good info and smart people on this site....as you've figured out, bigger isn't always better and going to a higher ratio rocker doesn't mean an instant power increase...