you can either shorten your dogbones about 3/4" or put in some spacers that go underneath the mounts for the trans and motor to raise it up a little. the spacers are a little bit more work, but most likely the best solution.

you just have to make sure that is it. is it misfiring or anything? is it strictly accel in the starting of driving, around 20-35 or so? gets worse the harder you pedal it for a short time?

i kind of need more information. is it just a dash rattle? or does the car shake?