Recently me and a buddy was using sea foam in my truck vacuum lines we had it running then it died why we were pouring in the sea foam. Now my truck will not start. I'm getting gas, good spark. I change the rotor bug but all it will do is turn over but won't start! Help! 95 Chevy 350 tbi.

Its possible that you fouled out the plugs. Which vacum line did you use? To use sea foam your suppose to get it in and shut it down but you should have already warmed up the engine to temp. Did you do that?

Remove, clean, and dry the plugs. If the engine doesn't start when you reinstall the plugs, try starting fluid.

Used the vacuumed line to the brake booster yes engine was warmed up

Do like Tx said but while the plugs are out, crank the engine BRIEFLY to clear any excess foam from cylinders.
(Be prepared to make a mess!)