The 2V heads hey? Now there is something that I thought had been lost in time. If I remember correctly, they were found in some optioned GS model XW and XY Falcons and were rare back then too. I also remember people attempting to cut and machine the cast manifold with varying levels of success.
One thing I cleary remember though about those engines. Give them a twin two inch exhaust system, and you would struggle to tell the sound from a V8... but then again, I am remembering from the ears of a then 17yo /ubbthreads/images/graemlins/laugh.gif