Been driving the k10 for few days now, other than the obvious horrible fuel mileage it’s running pretty well. Except for if you quickly WOT it doesn’t seem happy and hiccups for a second before revving up, is this considered still running rich? Lean? I noticed it when uh trying to spin tires lol. Rev rev floor it and dump clutch and it didn’t go as well as I’d planned, kinda hiccuped then took off with less rpm than wide open. If I’m already rolling and almost floor it than it’ll spin the tires. And easing into throttle it will get up to 4000 rpms.
what distributor are you using? it sounds like it could be a worn or sticky advance + check vacuum advance for if it holds vacuum(its not becoming a vacuum leak) you can check it with a hand pump. THe stock weights are made for a smog 78(i presume its stock 78) and what does yours look like?
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this is a stock 78(albeit not a k10) distributor. you are connected to edelbrock manifold vac right? are you on stock manifold, did it have EGR?
I would also say check your ignition components, spark plug to wire interface has dielectric grease on the boots, your plugs ceramics are good, the connections on the end of the plug look righr and the wire isnt "opened", the coil doesnt look rusted out or melted, the module or connectors dont look melted or possibly OE, you dont have a vacuum leak(dipstick and tube, distributor gasket, valve covers, pcv and the right kind of hose, vacuum booster line is booster rated, gasket on carb is okay)
To me, personally, it sounds like it could be a rich condition, but it could possibly be your idle mixture + maybe some old distributor weights and springs or even edelbrock tendancy to hesitate
There are a few things to look at that dont require money(some of the things above) but if you want to look at your carb,
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Is there any play in your accelerator pump linkage?
I forgot to send this reply earlier , but im not checking to see if I finished so hope its good