There's a Harbor Freight in STockton.

Get some cheap 6 sided impact sockets.

i.e.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=2543
 

1/2 drive

then tap it on

impact!!

Don't need it.

Put the bar in the same position & use the starter to break it free. The 6 point socket will make the difference.

If you want to use an impact gun & you have a good compressor & an impact gun you might be able to get it off. You will have to remove the radiator bolts, slide the radiator up & support it, then you will have enough room to get the gun in there. You don't have to drain or remove the radiator hoses to do this.