brake pedal differences ?

[Boog]

I have seen several times when a braking problem thread pops up one or two will suggest 'you need to drill another pedal rod hole 1 1/2" or so lower to adjust the ratio for a power booster conversion'.
In this thread for instance : https://67-72chevytrucks.com/vboard/...standard+brake
So what's the deal? Of all my junk yarding I have never seen any difference of truck brake pedals, at least of 1/2 & 3/4 tons.
From factory are there two different pedals depending on standard brakes or power assist brakes? Or is the drill a hole suggestion only a manner to adjust a mismatch of brake components?
On my '69 I have OE '71 power brake pedal assembly with large diameter power brake booster, front disc and rear drums. Fresh pads and shoes and all adjusted and bled the pedal travels more than I'd like and is soft. According to the above suggestion I should lower the rod attachment point and that will shorten the pedal travel and firm up the brakes. Or will that just require more foot pressure effort on the pedal to stop the truck?
What's the REAL deal?