Originally Posted by Cab_Burge
Polishing the intake port walls leads to fuel separating from the air at idle and low air speeds, you might want to make them not so shiny now to help avoid that work
I would check the lift at on all the valves at the retainers with checking springs to see how close your rocker arms are as far as their actual ratio are scope I've seen .130 lift differences when checking rocker arms from 4 different motors when I was blueprinting a NHRA stocker motor puke shruggy



Way back in the early 70's when Jack Roush was into Drag Racing that 4 door Maverick he put on a seminar and stated the same thing about over polishing the intake ports. Stated to match port the intake to heads , remove any big goobs and leave the rest of the head intake ruff. He was racing a Ford , but to me at that time made sense.

it's ok to butt heads, just don't do it with a butthead