Edlebrock AVS Thunderseries. I realize the jets are way too big now. I have original type oil filled coil, original distributor with Petronix ignition added to replace points. Up until I lowered the jets. It wouldn’t run right if I retarded timing beyond 40-50 degrees advance at idle. It runs perfect there and I put 5k miles on it at that timing. But, it’s strange to me that people claim they time their small blocks at 15 to 19 degrees in advance at idle. I can’t get any where near that timing. I have to guess what exact degree it is based on inches because it’s so far advanced. It’s a good 3-4 inches off the timing pointer plate. That would put it roughly at 40 plus degrees in advance. If I try to time it near 15-20 degrees in advance just playing around with it, it nearly stalls. My engine is 9 to 9.5 compression at best. It’s not a big horsepower engine. But, it’s not a tird small block either. I haven’t retimed it, since installing smaller jets.