[gtohurstjudge]

I bought some no.48 cylinder heads 10 years ago and stuck them on a shelf and decided to sell them, but I had never looked at the date codes until
now, but the date codes end in a "1" which I assume to indicate 1971, but 48's
were 1969 model year only.......so what have I got? I've inspected them carefully....
the raised casting numbers have not been tampered with. They are high performance heads with big valves and screw in rocker studs. Did Pontiac do
another run of these heads in 1971 for service replacement purposes?