does anyone know how to test the module inside of a hitachi dist...I have not been able to find any information on this item in any of the manuals

I guess nobody knows. I suspected a problem with the module on mine and went to the pullnsave and snagged a few to test out. Seemed to fix the problem but never figured out how to trouble shoot it.

Thanks for answering back with tour experience....with new heads,wires, plugs,etc., the motor at various times during idle has definite miss and again at the 5000rpm range it misses every once in a while, and in between that range nothing...when useing the "back to zero" timing light at the 3000rpm range, the timing mark stays rock steady...so at least I know that the distributor has no slop...it would be nice to handle this problem in a more professional way then just having to resort to the old saying.. "change it and see if it works"

I go down to my local parts store (B&B chain here in Washington state) and they have a tester. I've gotten to know the staff well enough that they let me test them myself. Their guys often don't put the ground clamp on properly and the module will test bad both at low and high rpm then. I have a few tested spares if you need one (not free but I'll accept offers).