340 External Balance Run Stand

mostrood said
Hi, Im finishing a mild '72 cast crank 340 build and want to break it in on a runstand. Whats the cheapest solution for starter connection? My cars auto so I dont really want to buy a $300 ext balance flywheel for one start up. Ive heard of cutting open and using 1/2 of a torque converter which sounds good except what about the external balance part? Seems like an off balance mess. Thank you

I got off the rails. If all you are doing is breaking in the cam and looking for leaks on a run stand, just find any flywheel and use it.

Doesn't matter if its internal or external. It won't hurt anything for what you are doing.

Using that flywheel in the car is bad, but you have an automatic so it won't matter.

Just get a flywheel on it and get it done and in the car.