[andyvh1959]

Everyone it seems goes for the earlier HO intake or the later 2008 HO intake for the higher end power. The Older non HO intake manifold has much longer intake runners: 510mm versus 350mm (for the HO intake maniold). Shorter intake runners are better for higher rpm power, like above 5,500 rpm. Longer intake runners are generally better for low to mid range torque and power. Anyone seen dyno chart results for a 4.7HO with the older intake manifold and the larger throttle body? I wonder if that combo makes the best low to mid range power (torque and HP) while giving up some grunt above 5,000 rpm (where I hardly ever drive my Dak).

 

[andyvh1959]

Thanks. That's the kind of answer that clears it up. I was already aware of the engine changes over time. The Allpar webpage is pretty good to provide a bunch of engine details. From the Allpar webpage it says the bottom end of the 4.7HO is pretty stout, same for the pistons and con-rods. So its a good base for a decent engine. Too bad Dodge never developed a turbo version (like the Ford Ecoboost) to make a 400hp version.

 

[andyvh1959]

When I go for the remanned 2008 or later 4.7HO long block for my 56 Dodge pickup build I plan to use most of the engine accessories from my 2001 Dak 4.7. So I plan to use the water pump, steering pump, AC compressor, oil pan, engine tone wheel, ECM, fuel rails/fuel injectors, etc. I'll get a 4.7HO intake manifold and possibly a throttle body from the eariler 4.7HO (and an adapter), exhaust manifolds from a 2008 or later 4.7. The coil packs and plug wires I'll buy new from Summit or whoever makes the best coil packs for power and durability.

Anything else to plan for?