I adjusted the valves, now it is missing like crazy?

[El_Crnicero]

Hey all,
I haven't posted much but I use this site all the time and love it.
I recently rebuilt my 350 and have maybe 150 miles on it.
Not a major overhall but; camel hump heads, timing chain, cam, barely used lifters, rods, intake, and holly carb.

it ran great for a while and the valves came out of adjustment so today I took it apart to adjust them. the method i used was to get #1 to TDC and adjust the exhaust and intake valves accordingly and then to get #6 to TDC and do the same. When I finished I went to start it up and it ran like crap.
When I tightened the arm down I did not go past 3/4 turn past 0-lash on all of the arms. It sounds like its missing really bad. I went out and got new plugs cause several of them were bad/ not so clean since the valves came out of adjustment. Hopefully that will fix my problems? Do you guys have any suggestions?
Im a bit worried casue my pops told me i might have issues using used lifters with my new cam... I probably should have listened to his experience.
Thanks for you help!