Wanting to finally get started on the full resto of my '67 Gote model 680, one problem is with the threads in the exhaust port of the original 5HP Briggs . Evidently the original tapered pipe nipple, or a pipe tap has been threaded in too far, oversizing the hole. The threads still appear to be full and "sharp" but a replacement nipple will not stay tight, even with a lock nut. I'm trying to decide what to try next. Thread locker (loctite)? JB Weld? I don't want to change blocks because the block is the original and I very much want to keep it that way. I also don't want to use a flat muffler that bolts on because that certainly won't appear original. Any suggestions? Thanks.
As found.
As found.