stock rods? i don't think you want to go over 6000.
otoh, intake passages are kind of narrow on the 340 ( it uses the same heads as the 300ci ), i'm not sure if it will pull much past that. the Buick 350 amounts to an overbored 340, but it has significantly larger intakes. i think the 340 exhaust looks like it probably flows better though.
do you know if any of the oiling mods were ever done to the engine?
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)