Posted by Kaegi [162.158.107.212] on Monday, April 20, 2020 at 01:26:31 :
In Reply to: Re: Yellow x's and no engine numbers question.. posted by Howard [162.158.63.13] on Sunday, April 19, 2020 at 18:57:46 :
sodium filled exhaust valves are the most HD valve anyone ever put in an engine that I know of. used alot in industrial engines. all the flathead mopars had hardened valve seats from 1933 on but the sodium filled valves were only in certain applications. My 361-3 medium duty dodge truck engine has them as well. last forever