Just got a quick question looking for some opinons....i got a 2000 lightning with about 125,000 miles on it and have a few bolt on mods CAI, MAF, Exhaust...i was wondering if putting a 4lb pulley on would be a high risk considering the amount of miles on it..i know getting my compression checked would be a good idea...but i was wondering if this would be too much stress on the motor?

 

With proper tune you will be fine.