My thought about the factory duals was less chance of two short manifolds cracking verus a long one piece one. Also i like the sound of duals on a inline six engine.And third,maybe a slight increase in gas mileage.The 300 six pulls like a v8 in that heavy truck.So far it is getting far better than my 1967 F100 with a newer 360 v8 in it.I am installing fog lights,dual battery setup,a complete set of after market SW gauges and a CB radio in it.
EvilDr235
