Has anyone used the jigs to drill and tap the 525 heads to accept the regular BB manifolds or headers?? If so, how well did they work and were there any issues using it?? Thanks

instead of that just drill the header flange instead

I have been thinking about installing Stainless Marine exhaust manifolds.

The jig stainless marine lends you when you buy there replacement 525 exhaust is easy to use and works perfect,stainless marine is having a 10% extra discount till end of year,Dave give me a call and i can hook you up and help with the drilling and tapping 443-223-6876,410-956-5381