Posted by Carls70 on December 01, 2020 at 21:18:03 from (173.31.215.244):
In Reply to: 2x4 posted by FastFarmall on December 01, 2020 at 04:31:35:
I like the 300ci/4.9L-6, IMHO they are one tough workhorse. I have consistently gotten good service out of them over the years.
My uncle built a warmed over one for his buddy with a 78 F-150. Used a 4 bbl Holley on a dual plane (offenhauser?) intake and split 3+3 exhaust. Shaved the head down some and advanced the cam gear a tooth. It had a very unique sound at idle and would walk away from the big blocks. His buddy was very happy with it.
The 300-6 in the forklift at work came from a junkyard just over 20 years and 12,500 hours ago. Initial mileage unknown.
In the years since it has had the manifold gaskets done twice, carb cleaned/resealed twice, 2 fuel pumps, 1 alternator, 3 water pumps, 3 sets of secondary ignition components, 7+ starter rebuilds, and 3 ringgears. I have snugged down the valve cover, lifter cover and oil pan bolts several times to minimize the effect of the automatic dust control system. It still starts right up in the winter and runs about 15 psi oil pressure at hot idle. I was surprised to still see the stamping on top of the pistons through the spark plug holes after a recent decarbonization soak.
I am interested to see how well the new light weight/high output/direct injected/high compression/electronic controlled everything engines last over the 20-30 year span.
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