I've spent hours writing down different firing orders based on which two pistons are at TDC at the same time, when you do the 4/7 swap all you have accomplished is to move the problem from the driver side rear block to the front passenger side of the block, correct
![work work](/ubbthreads/images/graemlins/custom/work.gif)
1843
6572 Standard Mopar V8 and early Chevy V8 firing order.
The 7-4 swap =1873
6542
![shruggy shruggy](/ubbthreads/images/graemlins/custom/shruggy.gif)
if you change it to:
1543
6872 you then change the two cylinders firing in line from each other to the passenger side two rear cylinders, correct
![whiney whiney](/ubbthreads/images/graemlins/custom/whiney.gif)
I'm done for tonight on this but a custom built crankshaft could remedy the issues, correct