Yes a 170 amp alternator will be a problem. In that case you need to use something that can handle the current and also change the wire from the alternator. Probably #4 to play it safe.

Wire from the alt to the starter is upgraded to a high strand welding cable 0/1 cable so that I have covered but the fusible link/breaker is my main concern. I was thinking I needed something from the battery to the starter but maybe I need to upgrade the breaker between the starter and the alternator? Like a 170amp tippable breakers but what kind? I do not want one of those "amazon 1/4 post" fire starters for $20 bucks.

These guys should have everything you need

https://www.waytekwire.com/catalog/c...rcuit-breakers

From what I can see in the photo it looks like you are already using the right mounting point on the carb. Check your throttle to see if it has a cable attachment point closer to the pivot. What I have had to do for a fuse replacement in an emergency is use a couple wraps of 18ga solid copper wire inside the fuse assembly. It was enough to keep the batteries charged, of course it was only a 45A alternator.