What tool are you talking about? One to hold the crank pulley in place?

Do you have air tools? It will come right out with an impact gun.

If not, I've heard of people getting a long breaker bar, resting it against the frame, and bumping the starter, which will break the bolt free.

88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride