Otto I understand what you are saying. But my engine doesn't have any of those issues. Compression is great, valves are fine and lashed properly, vacuum advance works, no vacuum leaks, clutch is fine, tires are 16" rims with 29 total tire diameter. At idle the vacuum gauge is locked at 18-19 without the slightest quiver. I've been running pertronix in the stock distributor for 2 years. If I run around 5 degrees advanced I can run up to 65 in a heartbeat, accelerate up a steep hill and bob your head back if I punch it while going up that hill. Drop her back to stock timing and I lose higher speed RPM and torque because it's expecting a 4.56 rear end and smaller diameter tires topping out around 45mph by dessign. Her legs are too long now for the stock advance curve. I've been running it around around 5 degrees advanced for a couple of years but it makes it idle rougher and purely for personal preferances I want it quiet and smooth at an idle. The truck runs great but I want a smooth quiet idle at the factory spec'd 500 RPM. I can drop back to stock timing and she's smooth as silk on idle, runs and accelerates smooth as silk. No backfire running against a downshift. Just no power/torque past 30 MPH. I can get up to 60 but it takes 3/4 mile of flat road to get there at stock timing. The Pertronix distributor I'm talking about has recurve springs that will start in just off of 500 RPM and give a steeper advance curve and can be limited to the correct all in advance the engine is designed for.
Last edited by bztguy; 09/03/2025 6:58 PM.
