I've been fiddling with the carb the last few weeks and felt I was making progress, but still not all the way there. I took the car for a spin on Sunday and the engine still had a significant vibration that would come in at 1500 rpms through 3500 rpms, go away until 4500 rpms, then return. Parked the car...f&ck!!!!!
I was messing around shooting the headers with an infrared thermo this evening and noticed the #8 cylinder was about 100 degrees cooler than the others. Inspected the #8 plug wire, looked brand new as it should. Then I decided to check the firing order for ****s and giggles...since I've done so over 2 dozen times.
That's when I found the GREATEST STUPID MISTAKE I've made with this build.....I had the #6 and #8 spark plug wires flipped!!!!
:p
Flipped them back the way they should be, fired it up and it's so smooth through the rpms now. HUGE difference.
Time to put some miles on it.
Daniel