88 trx 2x4 front drums

I have put disc on 2wd 300 , but they are all 96 and up , I had to make caliper mounting bracket and used a Rancher 2wd kit ( which is no longer available from SuperATV ) , I had a 88 2wd , it was my first 300 , at one time I looked into doing a conversion , the spindle bolt pattern on the 88 is much smaller than the later models and doesn't leave much metal for the bolt holes , but I think it could be done -----the pic shows the mounting bracket I made for the later model 300 2wd , the 88 the bolt pattern is much tighter , so you can see there is not much room to pull it off