Found this article on checking slack for the chain. I believe I will do this today.
4.13: Checking slack on timing chains
Several methods for checking slack have appeared on the list. One of
the easiest ways to check is as follows:
Remove distributor cap and spark plugs (removing the spark plugs allows
you to turn the engine over much easier). Locate the crankshaft pulley
and timing marks. On many engines, the crankshaft bolt is 19mm. Turn
the engine over with your socket wrench on the crankshaft bolt until you
reach TDC or "0" on the timing marks. Turn slowly (in the opposite
direction) past TDC while watching the movement of the rotor (inside the
distributor). A movement of 10-12 timing degrees before the rotor
starts moving indicates excessive slack in the chain and necessitates
replacement. New chains generally have less than 5 degrees of slack.
contributing: Allen T "Koji" Kam (tkoseki@uhunix.uhcc.hawaii.edu)
Aaron Lung (lung@san-jose.ate.slb.com)
http://www.mr2.com/TEXT/toyotafaq.txt