Quote:
Originally Posted by 73kay
Hey folks, just wanted to follow up to this. Broke down and bought a new dizzy and edelbrock 1406. Installed the dizzy and set timing to 10 or 8 BTDC, still had some symptoms. Installed the carb and voila! Truck drove like a beast. So something about the carb was causing my symptoms which included weird noise/slight vibration almost with a heavy foot and if I downshifted, some scavenging. It just ran like crap. The old carb had 1000 miles on it and always had a filter.
I didn't adjust anything on the new carb and it worked great. It's now dialed in and I am happy, but it just doesn't make sense to me. I also bumped initial timing back up to 16BTDC. Truck is awesome now and hope this helps anyone in the future.
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Thanks for posting the follow up and sharing the details of what finally fixed it.