I like the ramhorns as well, and are what I went with. LMC specials. I have to admit that before I sprayed some high-temp exhaust paint on them I felt compelled to grind off the country of origin. They did bolt up easily and seem to be pointed in the right direction though.
It didn't even occur to me that manifolds would need different bolts than the headers. I probably have all the correct bolts in my unsorted buckets of thousands of bolts from part-outs, etc. that I am genetically unable to throw away. I just didn't feel like sorting through them now so waited for an order of exhaust bolts before mounting these.
Last picture is of this year's bluebonnets in my backyard just because I can post 5 pictures and really only had 2 that were relevant