Re: 460 Truck Engine Intake?
Paul is right. The biggest mistake guys’ make when designing a towing rig is putting on Hi-rev intake manifolds, cams and headers. You are much better leaving the stock iron intake and exhaust manifolds on. They are going to give you much better low-end torque. Leave either the stock grind cam or a RV cam in. You are not building a racecar; you are trying to make a pulling machine. I have been towing a 7500 lb. trailer for 30 years and the best thing I did was put oversized manley S/S valves in the heads and ported out the exhausts. Leave the intakes alone. Get those smog bumps out of the exhaust ports and you won’t believe the difference in the pulling power. Also 2 1/2" dual exhausts with straight thru mufflers. I also pulled the weak Dana 60 out of the rear and put 10.25 Sterling out of a 96 F350 in it. I changed out the gearing to 3.73 while I had the sterling apart. I also ended up putting a 750cfm Edelbrock on it.
This truck will pull any of the summits in So Cal at 65mph without a problem. It also accelerates like a car from a stop sign with the trailer in tow.
Gary 86 T-Bird 3.8 77 F250 460 Hauler