Frank TheTank

I have the sodium filled zo6 ones now in my ported trucks heads they flow 300 cfm as they sit just seein if any one can comment on ppl who have used them zo6 valves and power they have pushed with them cause to change to upgrade d ones I'd have to change the seats that gonna cost a arm n leg so so help would be much appreciated in deciding if I should just get a set of afr or trick flow and this is a stock bore ls1 fully forged cause the cost of changing from the valves I got now to stainless or titanium would be around 750 to do so help please try to finish gettin this motor done bottom end is good to 900rwhp safely