Do I have to re-balance this 360

Not anymore. He went out last year.

About 25 years ago a friend of mine bought their "race prepped" small block Chevy rods and they were junk. He got a mix of 350 and 283 rods, the close and hone was terrible and the clearances were all over the place....They all just went in the bin.
Glad they bit the dust, did everyone a favor ..