you may not make much more hp but you can pick up a ton of torque
why would anyone get a stock 340 cam from a big grinder?-loosers thats who
for a 59 year old stock cam get an elgin, wolverine blue racer, speed pro- great quality- you deserve it
save some serious coin
you did not say if you have a low or high compression 340 so all suggestions so far are bogus
only clue is that with headers you do not need a hugh spread between intake and exhaust
stock heads just a medium split, portef or afternaeket heads eveb less
so how about some details
thats a good cam but $$$$$ and eventhough it has the same duration as stock it breaths much deeper
post up your ompression gears etc before asking for cam advice
btw 340 cam is 210-220 @ .050
