What do you think it would cost to make a 302 head perform like a TF? The answer is you can’t. Simple as that. Why start with a turd and buff it? Why not start with something worth having? Is it because you want to show everyone your prowess? By all means, have at it. To argue for using that casting or any cast iron passenger car head rather than even the lowly Speedmaster head is a fools errand. Have a fun trip.