long story short, i bent some valves due to a timing set failure (brand new GM unit) the car was already equipt with manley race series valves, i ordered new valves from manley and i ordered the wrong set, they are the right dimensions just the wrong series (the narowed part under the valve face is narrower longer on the race series) so i ordered the correct valves and had them installed well i was dumb and didnt pull both heads, and theres 2 slightly bent valves on the other head now, so we pulled it off. now will the valves i misordered be harmful to the motor? the only differance is the machined part under the valve face. sorry if this is confusing but if i can use these my car will be up and running tomarow if not i have to wait for new valves.

 

Doubt that it makes any difference.JMHO

 

head is at the machine shop getting them put in (i don't trust myself seating them) they said it shouldn't make any noticeable difference.