I have a buddy with a old Nova, has a SBC 350 in it, pretty much stock from what we can tell. The other day he said it started acting up where if he jumped on the throttle he claims it would "shake alot and go no where". He said if he rolled into it slowly it would get going. How today he's saying that if he mashes the gas it is just falling on it's face and almost dies. He said if he rolls into it it's fine though, says it takes about 3-5 seconds to roll into the throttle slow enough to get to WOT. I ran a quick test on his vacuum advance and verified it's at least holding vacuum and changing the advance. I'm wondering what else might be going on here. He's changing the rotor and cap right now.