motor off balance???

And yet another problem im going to pose to you guys. I got the 68 up and running yesterday and went and drove it. Seems to lack any substantial power and the motor seems to vibrate much more than normal upon acceleration. I know the 302 wasnt as refined in 68 as it was in the fox bodied 80's but i was still expecting more.....as of right now my 66 whips it hands down(fine with me as mine is 66, my wifes is the 68..).
i also posted earlier about the ticking noise from the engine....out on the road that noise become intermitten...comes and goes. any ideas are always appreciated. thanks............mac