IT'S A STOCK REPLACEMENT PISTON. Or a high perf version of a stock replacement piston.

Thousands have been installed in 360s without rebalancing. It's not an issue.

People on this board will tell you 95% of the time that anything and everything needs to be rebalanced. That's bull. But it's easy to spend your money.

Chrysler balancing specs had to be the widest in the industry because the anecdotal evidence is huge. Yet, there weren't customer complaints about engines running rough. Chrysler engineers were very, very good at figuring out what corners to cut to get costs down.

I'd go a different way as outlined above, but do a search and you'll find an article by Steve Dulcich about a 360 with those pistons making 417 hp with stock heads.

R.

PS: Weird but true, the Oz seller appears to be low. Their dollar is worth $0.76 US so there is a set for $150 Australian that comes out to $114 plus shipping. I'd be looking at UPS or DHL for the delivery.