Tuning issue/help

[mm1077]

Hoping someone here can help : ).
I’m so close to being able to actually drive my truck daily…I just upgraded some parts and did basic tune up. I can’t get my idle mix screws to have any effect on vacuum reading and I can turn them all the way in (gently) with no effect on anything.

Vacuum advance is unhooked from ported vacuum source and capped, all of my vacuum hoses are new, I put the plug in the back of the carb, sprayed liberally with brake cleaner looking for vacuum leak/idle change, timing showing 17 degrees at idle- motor has a cam but I don’t know the specs. The mark, however , did sort of ‘move around between about 15-17. I think I’m using the timing light right lol…turned it up to 17 to show the mark at 0 on the tab. I Hooked up the electric choke and set it so the butterfly is just slightly open when cold . I also had installed a vacuum canister to hopefully help with the brakes (line from intake to canister and then from canister to booster).
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