I don't frequent this board much now, but I stopped by and the title of this post caught my eye. I had a 1989 F-250 Super Cab (7.3, ZF S5-42, 4.10 axles) that was bone stock when I bought it in 2009. It ran fine, but was a little tired. I dropped a Hypermax turbo and Moose pump in it and it had quite a bit mo' power. If you want more power, do that and install an intercooler and your life will be better. (You'll have to tune it correctly, as well.)
In December of 2016 I bought a 2008 F-450 (in my sig). It had 96K miles and a DPF delete. It now has 115K and the only problem I've had with it was a broken dipstick tube.
It is impossible to overstate the difference between the two trucks. I thought my old F-250 drove pretty well until I took the F-450 for a spin. 300 hp and 650 lb/ft of torque was quite an improvement in the giddy-up department. The ride is much smoother and it is more enjoyable to drive in every way.
Anyway, I know this board is mostly dedicated to guys who are into the IDIs, which at one time I was. However, if you can afford it, my experience says buy a 6.4. I have had very few problems with mine and enjoy driving it every day.
In December of 2016 I bought a 2008 F-450 (in my sig). It had 96K miles and a DPF delete. It now has 115K and the only problem I've had with it was a broken dipstick tube.
It is impossible to overstate the difference between the two trucks. I thought my old F-250 drove pretty well until I took the F-450 for a spin. 300 hp and 650 lb/ft of torque was quite an improvement in the giddy-up department. The ride is much smoother and it is more enjoyable to drive in every way.
Anyway, I know this board is mostly dedicated to guys who are into the IDIs, which at one time I was. However, if you can afford it, my experience says buy a 6.4. I have had very few problems with mine and enjoy driving it every day.