At what point would you step up to ferrea hollow stem valves

Re: faceplated 4-speed

I have one in my GTS and it is relatively street friendly, stays in gear and shifts excellent at higher engine speeds. I think it about 14-1600 for a 9310 faceplated gear set. To clarify that is 2-3-4. 1st gear is not face plated so you can put it in and out of neutral without shutting off the engine. 235-60-14 bias DOT tire.

Do it!