I have a 99 F-150 with a 5.4L. I got a super charger from a buddy that was on his 2001 F-150. Both have the VIN L engine. My question is about the crank pulley/balancer, They are alittle different visually, but are they the same balance? The crank pulley from the kit wont bolt on to my balancer, but bolted to his. Any info would be great, or if any one know where I could get the answer, that would help too. Thank you, MIKE