I can tell you with 100% certainty the K&B made cables in a 7.5 are far easier to turn than a lawless strong arm cable, from an amperage draw setup, everything else being the same. They are MUCH more flexible.
I have plenty of the Novarossi .46DD engines in stock (new), with or without carbs. I also have plenty of new and/or used pipes.
I probably have several cheaper used .45 engines also, anything from used K&B inboards to used Novas.