The biggest issue when using a cap from a different engine is the lateral offset( reason the op broke his cap by putting it on backwards) With the proper lateral spacing it then becomes a vertical diminsion issue--too big, the cap needs to be cut, too little it needs to be bored---or shimmed.

Also---for the op---the cap can be built up with weld and machined back to fit the recess in the block with a simple flat file!!!

I consider my equipment to be top level and my abilities/experience to match--I probably line bore/hone REPAIR a deal such as this every month or so and as for just the routine line bore/hone operation weekly plus all the billet spayed caps that we install on the engines we sell ( currently we are doing several LT sbc blocks to 383/396 strokers)---
the touchiest part of the process still is cutting the stock caps flat as they are not square so that they fit in a cap grinder straight---always takes some finess