My understanding is the stock heads were to big for 426 inches and they work much better w/ another 100 inches. What would the flow be of ported stockers @ .600 vs. the flow of stock Edelbrocks?
Take care, Rick 68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
