it's when "perfect" becomes the enemy of "good enough" and honestly, most all of these engines are just fine and dandy at "good enough" and most owners will be more than happy with that outcome.
i want a little more pep in my 318 2bbl: oh, well, sonny boy lemme tell ya something you're gonna need a 360 with a mountain of cranking compression and aluminum heads otherwise it ain't **** and you shouldn't bother!
well, i don't have that kinda money: that's not a problem, just get yourself some 4.10's and a 3500 stall converter. that'll put some tabaccy in your pipe! wake up that ol' wheeze bag 318 like nobody's business!
but won't that make my car turn a whole bunch of RPM on the freeway and give me an extremely narrow band of power to work with? i mean, i'm sure it's a kick in the pants around town but what if i wanna get on the highway and go see my sweetie? she's a ways away at university. and what about fuel economy? my utoob channel is just starting out and i'm not an influencer just yet, i don't have the followers so gas money is kinda tight.
pish posh! you said you wanted to go fast. everything's a compromise, so either spend the money or make do!