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Have had plugs out, checked cap, wires, rockers, pushrods, timing, carb is new, disassembled anyway, adjusted perfect, choke works fine, cars runs GREAT after warmed up, but still has minor shake, not a miss, like a vacumm leak. sprayed intake & carb no change, checked all bolts..... so that's why i am here,,,,,,,
Start car, idles w/choke at 12-1500, no miss no pop, nothing except shaking until warm.....

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How did you adjust the choke door when it was cold..
there is a spec(usually a drill size) and that will
be a tad lean... then once the door is set then you
set the cold idle rpm on the choke cam

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I would say you have a carb issue... more than likely
its running lean on the warm up.. I will guess its
running at a lower than normal rpm when cold(just
staying running) and would be a choke issue

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I agree on the choke issue but I have seen the opposite with chokes, there adjusted to rich, when their adjusted lean they die and won't stay running, at least it is that way west of the big muddy OP, you say you changed the carb or it doesn't have the original carb. on it still look at the choke adjustment, even if it has the original carb. on it look at the choke adjustment When cold you should see the choke plate almost closed to the divider in between the front and back barrel, it should not be closed all the way and tight Look at it with the air cleaner off, open the throttle about a 1/4 of the way to full throttle and let it close, look at the choke plate then . Start the car up and see if the choke pull off is pulling the choke blade open some when running or if it is not doing anything Let us know what you find

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Have had plugs out, checked cap, wires, rockers, pushrods, timing, carb is new, disassembled anyway, adjusted perfect, choke works fine, cars runs GREAT after warmed up, but still has minor shake, not a miss, like a vacumm leak. sprayed intake & carb no change, checked all bolts..... so that's why i am here,,,,,,,
Start car, idles w/choke at 12-1500, no miss no pop, nothing except shaking until warm.....

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If anyone can provide me with some possible fixes for my 1966 273, Hi-Po 4 bbl. I will be happy to call evenings. The engine has probs, would prefer to discuss on phone as it will be quite lengthy.

Engine was rebuilt a few thousand miles ago (so i was told) and the guy said he installed a Hyd cam vs the original solid, but "did not replace the adj rockers." Which being a shadetree mech, I saw no prob, except harder to adjust properly. The engine has a new Edelbrock 500, on the stock intake. When you first start it, the engine rocks like it's going to come out of it's mounts, like a terrible vacumm leak, then once it begins to warm up, the rock & roll settles down, to acceptable but not smooth as it should be. it definitely has a peppy cam, the guy said a little over stock. SO, that being said, does the ratio of the solid adj rockers have anything to do with the prob. ?? It is almost like the lifters are adj too tight, but then it gets better, as it warms up. Timing on 12 before, New electronic dist & ign. carb is NEW and adjusted correctly. I have adj the rockers from 1/4 turn to 1/2 turn, never gone the full turn. Once the engine reaches temp, it runs fine, but still a lil rockin.

thanks

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If the lifters (and cam) were changed from solid to hydro, you can use the same stock adjustable rocker arms, BUT you cannot re-use the original pushrods, as they will now be the wrong length. Find a set of pushrods out of a '70's 318 motor and try them for a test.