2001 1500 Ram 5.9L gas engine
Problem is that when i'm on the highway traveling 60+MPH, alot of times my engine light will come on and blink, some times the truck will start to shake(like the road is bumpy) the shake will go away if I increase the RPM's sometimes it comes back once the RPM's go steady sometimes the shake won't come back for awhile. The engine light will turn off if I let of the gas for a little while. Sometimes the engine light will come on if I get into the gas real hard but other times when i'm just cruising along. Never comes on unless i'm on the highway. Also I can here a very distinct metalic tinking sound my guess is its a peice of metal in front of the catalytic converter from when i got it changed, but i'm not positve.

What I have instaled on the truck is:
MSD 6A ignition
MSD blaster coil
MSD plug wires
Ram air hood
High flow magnaflow catalytic converter
Flowmaster exhaust

I don't know if one of these things has to do with this problem, I kinda did everything together so its hard to pin point if this problem started after one of these things were installed.

I hooked a computer up the truck to try and read the engine code, the code wasn't in there unless the light was on, it was hard to drive 70mph and work a computer at the same time, but I manage to get something about cylinder 5 misfire, but the truck never seemed like it misfired. Also when I had the computer hooked up I checked out the O2 sensors, the sensor - B1S1 the fuel trim% jumps anywhere inbetween -5.46 & 4.68, but the O2 sensor - B1S2 the fuel trim% is a steady 99.06. The voltage on both sensor change around but are different at the same time.

Any help would be much appreciated. I plan on doing some long distacne traveling soon, but don't want to take my truck with this current conditon
THANKS

Check your spark plug #5.

I have similar problem where is was shaking badly at idle and then gradually clears away at higher speed. However, over time even at higher speed the vehicle shakes badly.

I did replaced all 8 with platinum type spark plug before I have the problem. Check the code and it tells me about #8 cylinder. I took out the spark plug on #8 and it's tip is broken off and it has little bit left to allow it to fire.

I took all 8 spark plugs and went with cheap one autolite (cold type) and no more problem. Those platinum IIRC are higher temp spark plugs it creates good spark but probably causes more detonation.

this is a long shot, but have you checked the routing of the plug wires? if I remember correctly, there was a TSB a wile back that had something to do with the plug wires being ran to close to eachother, which could cause misfiring.
this may not even be an isue since you upgraded plug wires, but again, it couldn't hurt to check.