
I have a 69 F 250 C/S C6 with a 390 265 dual energy comp cam with springs , Holly elec fuel pump 25GPH ,4 psi no reglator , Flexilite Black magic 180 elec fan , 500 cfm Holly 2bbl 4412S straight through mufflers i just drilled a 2.5 inch hole in each one instant flow masters. I have Patriot headers to be put on soon the motor is a monster no need for a 4bbl with the 500 cfm Holly the truck sat for 15 years its a CA , truck so it was not in bad cond i bought it motor was no Good had it rebuilt along with trans spent almost 1 year of weekends working on it and it took all my money

