I have searched and searched and still havent found what exactly needs to be done to the stock swingarm to fit a 300 in there. Any tips or info would be greatly appreciated.. Thanks!
Your best bet is to buy the rear swing arm on DLP it comes in either black or chrome.
To fit a 300 tire on the stock arm requires moding buy cutting a section out on the drive shaft side, unless you are a fantastic welder and wouldnt reccommend it.
Be safe go the DLP way!!