Yes the camaro manifolds will bolt up to the L67...or a set of pacesetters seem to do a good job. As for that 94 it's no use to you. 94's motor options were a 3.4 or an LT1 therefore neither trans will work for you....if you got a 5 speed trans I think you'd be able to use the L67 PCM since it doesn't control the trans. A little trans rewiring is required but it's nothing major

Any other questions just ask