I think Mr. Gasket has a bracket to mount your alternator to headers. It'll put it in the same location it's in now.I could be wrong about who makes it,but it should be easy to find.I used one a while back on a '55 chevy,and I found it on the chrome accessories board at the local parts store.(Actually,the one I got was for a generator but it was easy to make it work with the alternator.)
Speed


1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck