413 cylinder heads... are these toast??
I thought those were the 516 Closed Chamber Heads by looking at them, sure enough if you read the casting numbers.
Non hardened valve seats, the exhaust valves sink on those.
Did a set of those to keep a 1967 383 all original. By the time I bought all new valves, springs, valve seals, hired the machine shop to install the new hardened exhaust seats and do the valve job, and waited 6 months for the machine shop to get the work done.
$1000.00 dollars later I had a nice set of 516 closed chamber heads to bolt on.
After this experience is the day I started doing all my own valve jobs in house.
I thought those were the 516 Closed Chamber Heads by looking at them, sure enough if you read the casting numbers.
Non hardened valve seats, the exhaust valves sink on those.
Did a set of those to keep a 1967 383 all original. By the time I bought all new valves, springs, valve seals, hired the machine shop to install the new hardened exhaust seats and do the valve job, and waited 6 months for the machine shop to get the work done.
$1000.00 dollars later I had a nice set of 516 closed chamber heads to bolt on.
After this experience is the day I started doing all my own valve jobs in house.
