Well, I finally figured out how to adjust the timing on my 91 K5 with a 350 after two weeks of owning it. (who's the horses ass the hid the tan wire with a black stripe under neath the brake booster?) It's got 180k on it, just the way it came from the factory in 91. I've got MSD crap on my 496 and I'm pretty impressed with it, so I'm curious as to whether or not I can use MSD components on a TBI engine? I'll go with a coil, and plug wires for sure since those are transferable to a rebuilt 350, and may as well go with a cap and rotor. So, the question is who makes ignition performance upgrades for a TBI 350?