Found some info on these pages.
http://firstgenfirebird.org/FAQ/engine/OHC.html
http://firstgenfirebird.org/FAQ/engine/sprint.html
http://firstgenfirebird.org/firebird/1968/sales_manual/M-4.html

All these were linked off a cool site on Sixes
http://no25.chuckthetruck.com/page4.html

If you get a chance... could you
Post a pic of the OHC for us young punks that never seen one?


250 Integrated Head / 1981 C-10 Pick up.