My 89' K1500 has basically the stock 350, with the exception of a chip, power pulleys, and a drop-in K&N. I'd like to up-grade the ignition system . Not sure if I want an MSD, Jacobs, etc... Also should I go with a box type system or just a coil and module? I also have plans on getting headers and getting a Holley TBI system if that makes any difference. AAHH hell , what are a good choice of headers for these trucks? Thanx for the info..