1991 305 was not a performance engine. Cam specs were: Don't know what he base or advertized duration was, but that's a poor comparison bar anyway, since it can be measured at anywhere from .002 to .006 tappet lift, depending on the company calling out the spec. Dur. @ 0.050 is a much bater way to compare cams, IMO. Spec for the 305:
178/194 deg @ .050, .350"/.385" lift assuming stock 1.5 rocker ratio. 109* lobe seperation installed at 112* intake centerline.
That was the same as the 4.3 V6 of that vintage.
MV
