I had a 1994 Vectra on a Ford F53 chassis with the 460. Mine was the 34RA. Had 81K miles on it when I traded it in and I never added a drop of oil between my 3000 mile oil changes. The 1994 Vectra was a very fine up scale motorhome.
HP was 245 @4000 rpms
Torque was 400 at 2200 rpms
I had absolutely no engine problems and performance was fine, even towing a car.
Sarver, PA/Crystal River, FL/Shelocta, PA ∑ FMCA 335149 ∑ W3TLN
2005 Suncruiser 38R ∑ W24, no chassis mods needed ∑ 2013 Honda Accord EX-L ∑ 2008 Honda Odyssey EX-L