Fuel pump for 318 small block

I have an angry cam in my 318 and have always struggled to get it tuned good for idle --- edelbrock 600 carb -recently tore it all down and cleaned ot all etc and have been tinkering to reset stuff....have the idle as good as it will ever be, but in my tinkering today I had a rude surprise....I can run hard up to 5k hard in first then manually shift to second but when I approach 5k in 2nd, the engine starts to fall flat around 4k.....bad.....cant tell if its gas or spark to be honest....its...

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Author: shadango