78' t/a

my trans am seems to run better some days and not so good others. some days if feels like the cars wants to go real fast and has a lot of power and some days it doesn't feel as strong. i just got the engine rebuilt and we put in a new distributer. the old had the vacumes set up all wrong and the timing was all over the place. after the new distributer was put in the timing [ 16 ] was fine but it still runs different from day to day. i don't know where the problem is or if that's normal.

thanks

check dist spring under the rotor

Watch for disapearing oil/antifreeze that might indicate a leaking head gasket. If you have the tools available run a compression check. Also check for carbon buildup in emmisions components.