installed new starter and now I have a short?

Glad you got it figured out.
Those starters use less amps on top of spinning the moter faster.
There are a couple of things on my own car that I would NEVER go back from.
The mini starter is one and the HEI ignition is the other.

Word. That mini style starter spun my 451 faster than the old gear reduction starter hands down, although i kept a points distributor in the trunk after i made the jump to the E-dizzy. About a 10 minute swap if it ever failed.