i just finished fully restoring this 63 impala ss with a 327 and a powerglide 2 sp. runs great but after i drive for around for a while like couple hours. and then i stop at a light car sometimes wants to die. also if i park the car it wants to die when i put into gear so i have to brake/ gas at the same time to keep it from dieing. I've had timing checked and rechecked a few times, leak tested everything, running a edelbrock 600cfm carb, all engine is stock but rebuilt. stock tranny rebuit. any advice on what to look at next for possible fix.