Anybody ever swapped out a heavy( stock) rotating assy for lighter aftermarket?

It’s not the power but the weight that breaks the 8 3/4. Their pretty reliable until you get over 3300# and high 10 sec. et’s. Then you need good caps and bolts. A lot of racers are going to the S60 from Strange. For about what it cost to brace, put axles, spool and all the good stuff in the 8 3/4, you can have a much stronger rear. Just bolt it in and go.