New Int/Exh Valves & Over-Sized Valves?

[~JM~]

136K miles & the heads are off. Thinking about replacing the valves while I have it apart. Seeking advice on make, material & type of valves to use.

Is there much of an option for larger valves? Doesn't look like there is much room between them.

How often are valve stem seals installed on the exhaust valves?

[Steve Wood]

here are a couple of threads from the past.  Not much benefit, if any, over stock valves...

https://www.turbobuick.com/threads/porting-heads-go-big-valves-or-stock-size.204690/

https://www.turbobuick.com/threads/porting-heads-go-big-valves-or-stock-size.204690/

[~JM~]

Thanks. I'm not having much luck with my searches. The points brought up on the exhaust side interest me. I've been looking at the head casting & feel the exhaust side looks very restrictive.

[~JM~]

Vertical pics are the ones that do not turn out well. Same pic as above but turned horizontal.

[~JM~]

 

[nocooler]

I forgot how shitty that exhaust port is

[~JM~]

https://youtu.be/aMmgG0iaCI4?t=1415

[~JM~]

https://youtu.be/As36dt7waBw