Speed Pro H116CP pistons drop in with no rebalance?

I have built at least four 360 engines using those pistons. No rebalancing is needed. I went as far as having my machine shop check them out and he told me that they are the same weight as the stock pistons. He told me what they did was move some of the material from the skirt to the top of the piston to make it a true flat top piston and up the compression. I think the piston pin maybe moved up a bit too because they will be at "0" deck height at TDC. I'm running a set in a 360 with W2 heads that sees over 6500 rpm on occasion. Been beating on that engine for years now. Stock crankshaft with 340 rods just because they are floaters. Rebalancing is always good advice. Mopar didn't always do the best in that department but it is what it is. So with that said they are heavy but damn good replacement pistons. Put then in and run it.