SuperDave
Member
Please forgive my ignorance, I got a pair of used 346 heads for rebuilding my 400. I need to know where is, and how to read, the date codes on these heads. I know in 73, Mother Mopar started using hardened exhaust valve seats in anticipation of upcoming unleaded fuels. I'd like to know if I can just hand lap the valves and run them as-is or if I must take them into a machine shop to have hardened seats installed.
I did take these into a local head shop (the valve spring retainers & keepers on 2 valves was missing) but "technician" on duty either couldn't or wouldn't tell me if they were or not.
Thanks in advance. Go forth & be awesome.
I did take these into a local head shop (the valve spring retainers & keepers on 2 valves was missing) but "technician" on duty either couldn't or wouldn't tell me if they were or not.
Thanks in advance. Go forth & be awesome.