Don't worry about the pistons being dished. With 64cc Vortec heads you will have plenty of compression,I'm guessing in the 9.25-9.5:1 area.
Evan with 76cc heads you will have a true 8.4:1 ratio with thin head gaskets as per the many goodwrench build up articles.Which is a little low for the L79 cam but not a total mismatch,with your 3.73 + 4spd setup to make up the bottom end.
My uncle has a dished piston stock short block with the L79 cam and 462 fuelie heads(2.02s though)and that motor is plenty stout and snappy for a cruiser.......and sounds nice too.
Last edited by 78 monte; 08-19-2012 at 06:06 PM.