Re: Proper sized exhaust
Agree with WDShaffer. Duals are nice. Put mufflers in rear. Better for flow and will not give you a noise headache in cab. If duals, get quiet ones. IMO.
This is commentary not aimed at anyone.
This Holley carb thing is over rated. By the math, 305 reaches equilibrium at about 300 CFM. You only have so much manifold vacuum. 500 CFM seems to work because we fiddle with them and get a fuel to air balance that the motor wants. Not more, not less. So you tune/jet your Holley to be a WW. The 305 was designed for torque not revs. The "extra power" may be imagined by us guys wanting to feel like we are supermodifiers. If you want a hot rod, a 305 ain't it. Most of our trucks have stump puller trannys and rear end ratios. But a really good motor. So why are we looking for higher RPM's? So we can blow up something? I will love my WW's and Rochesters. If a person does a Holley thing and they like it, it may not hurt anything as long as you have the money, don't over rev, don't experience low gas mileage, don't bog down on take off or don't constantly fiddle diddle. If you argue with scientific Carburetor math, have a good excuse that no one else thought of in 150 years.
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