I think you need to layout out a plan and stick $ beside everything.
$400 for a 230+cfm head is a steal. Is it ideal? No. Then again neither are TF 11r190's on a 351... there is a mentality of "to do it right"... then there is reality of budgets. In the "to do it right" world where do you stop? It's been mentioned already something to the effect of don't put 302 parts on a 351... so, in that vane, why would you put 190cc heads on a 351 when that is what all the faster 302's/306's are running? Step on up to the 205's... but guess what? 190 = $1600... 205's = $2000. But wait, why build a 351" when you have the potential to have 408"... going to build a 408 going to need 225's race ported for $3000+... it never ends when the budget is overlooked.
$400 230cfm heads, $400 solid custom cam and $400 solid lifter ($1200 total) is going to make more power than $1600/$2000 heads with a stock lifter and cam. (of course an no2 kit with be cheaper than either and faster than both) Yes, you can cam and lifter with the better heads too... now you are looking at $2400/$2800 vs $1200...Lets not forget those 12:1-13:1 pistons are going to be $500+. Well over half your budget and you still have to buy assembly lube, fluids, gaskets, plugs wires,intake carb, fuel pump, dizzy, coil, headers... opps, there is your budget done... too bad you don't have money for arms, shocks gears, convertor, slicks/skinnies, driveshaft loop, line lock, tach... bet you want a manual valve body and shifter too right? Do you have a helmet... how about a dolly/trailer to get it to and from the track? LOL it all adds up. You start putting $ with the stuff listed above and you'll see $5000 is going to be tight.
With 230cfm, 13:1 compression, 1-3/4" open headers with a good carb intake... if cam'd properly, there is no reason it cannot make 450+fwhp.
Now, a bunch of folks are going to chime in and say, ya, but the future...
If you want to start another thread about a car that someday might run... and budget isn't all that important then feel free to do so.
In this thread you asked about making a track only car for $5000 dollars that'll go 11's.