Hey all. Been reading a ton but first time posting. I know this issue has been brought up and I've read all those posts, still at a loss. Hopefully I'm doing this right. I have a new to me 1978 Camaro z28. The engine is from a 69 z28. 355, long flow heads, flowmaster exhaust, upgraded cam, auto th400 transmission, upgraded carb. All of this was done before I owned the car. I had a local garage that restores classics give it a thorough inspection before buying it. I've had the car about 3 weeks. I drove the car about 400 miles since buying it, loving every second. The only issue I had so far is the cable from the shifter to the transmission fell off cause the clip was missing. Easy fix thanks to info on this forum. Wednesday I took the car out after work. Drove around for about an hour. Mix of backroads and a bit of highway. Not driving super hard, never went over 75. Made 3 stops in that hour where the car was off for 5-15 minutes. Started right up everytime, no problems. Drove home, parked in the garage everything normal. Rained all the next day so the car didn't move. Two days after the last drive I went to change the section of wire with the tach filter on it. The filer in it was a mess and the wire didn't have a current through it when tested. My tach was the only gauge not working. After what I thought was an easy swap I went to start the car and NOTHING. No crank at all. Power still works on accessory. Lights, signals, radio, etc. Volts testing normal and when I try to start the car the volts don't really dip at all, lights stay on same as they were. Could the new filter have fried something? I ordered it from Ecklers Automotive which seems to be very legit. I even tried putting the old crappy one back on just to see if that was the issue, but nothing. I checked the metal part that rotates on the steering column to see if that was the issue, nothing. I took the shifter apart to make sure it was actually in park. That checked out. I checked the lever in the engine bay that tells the car what gear its in and if its safe to start. I don't have the rod that goes through because of the headers but I didn't even know it existed until I read about it researching this issue. That checked out as well. Battery tested fine. Tried jumping anyway, no change. power from battery to starter tested fine. I took the starter off, cleaned the contacts even though they didn't show any real signs of corrosion or excessive rust. Hooked the starter back up, nothing. I took the gauge cluster out, all connections still solid, all grounds still in place. I checked the semi-round switch (blanking on the name) that's at the base of the steering column and all those connections were firm, no corrosion. The only thing I can think is that the wire from the starter into the car is no good but I'm not sure what to do with that. I thought I traced it through the firewall. The wire I was tracing was thick and orange. From what I'm reading the one that powers the ignition is purple? I bought a new inline fuse from advance auto parts but didn't cut up the wire since I wasn't positive I had the right one given the color difference. Is there anything else I should be checking before having it towed and paying a garage for a fishing expedition?