Quote:

The engine was already balanced but had very high compression pistons and I don't know what for rods. I'm going to put about 9:5 to 1 pistons in it and stock rods .I want to make it a little more then stock but not to wild since it is the original motor.



So you are putting different pistons and rods on replacing something of unknown weight and you are wondering if the high compression domed pistons weigh the same as the replacement pistons ??

Sure I 'll bite ... run it as is, having the rotating assembly balanced is just a money grab touted by greedy auto machinists ...