Ive got a prob. my t.b.i. 454 was stack firing. i fixed that. the timing was supper advanced. i fixed that. now it almost feels like its miss firing when i accelerate. only after it gets above 2000 does it run fine. im getting tired of effen with this thing any ideas before i put er down for another year or so

 

Stack firing
never heard that term
What is that?
I am trying to figure out what is wrong with mine.