Bought a selection of cores- still waiting for a few. BUT after I clipped just one of these on a looped section of drivers side harness the radio worked- will post pics once I have it licked
@Turbo4whl , don't have a ground strap on the hood but ohm meter between hood and firewall shows good connectivity- same with radiator support. @bucket , When I talked to the Morimoto guy he said the loop was the only way to get rid of it. Oddly, my prior LEDs had no RFI
So I bit the bullet and put the LED headlights in- and they are great! BUT they also totally kill the FM radio. Tried just sticking these ferrite cores (https://www.amazon.com/dp/B08DC9JF5K/) on the leads, but no joy. Called Morrimoto who makes Retrobrights for Holley and they said I need to...
@Bennyt - great tip on Holley clearance! Just got a couple 4 button window switches for 5.57 each! https://www.holley.com/products/deals/clearance_parts/parts/09-106
I got ACCEL 4048 Spark Plug Wires I thought fit my 83 K20 Suburban 350 LT9 (wires route underneath the exhaust manifold), but no matter how I route the wires a couple of the wires are super short and too tight to the exhaust so expect they are wrong for my application. Frustrating as it runs...