Larger valves for 3.4 iron heads

[rjblaze]

Are there any larger intake / exhaust valves from another GM product that can be installed into a set of 3.4 iron heads? I thought I read somewhere that 3.8L valves are the correct length, larger, and will fit in the combustion chamber size of the 3.4.

[SappySE107]

They are 8mm stem so they won't work with iron head 60V6s.

[geoffinbc]

Yea wrong stem. The small block uses the same stem size but I doubt you could fit anything bigger in there without offsetting the valve center or going with a smaller exhaust valve. Perhaps you could get 1mm larger without too much hassle but I doubt it is worth the cost. I would think money would be better spend on other parts.