Originally Posted by gearheadslife
because not everyone drives around at 5000 rpm..
they are fine for a cruiser.. and give up zero until you pass 4600rpm.. on a 350.. the 327 is less air in and out.. so.. unless it's a race ,more than street cruiser the factory manifolds will be fine.. ramhorns are better than the vortec logs.. but if it's a cruiser. it doesn't honestly matter.. other than packaging..
If you drive at part throttle you'll notice a difference. Not everyone uses a cam with no overlap.