Headman Header Brackets - Alternator Location

[Brim]

Did a search but most of the results were for second gen. Here is the breakdown, I have a 64 fleet side with a 283/th350. I bought some Headman
longtube headers back in April and I want to install them.

The problem is my 283 has the alternator mounting points on the exhaust manifold (drivers side) and the OEM curved adjustment bracket.
From what I can tell when I go to install the additional Headman brackets that replace the exhaust manifold alternator mounting point it looks like it will be about an inch over more. Originally I figured a longer belt might be in order but I am wondering if I go that route it looks like I will have no more adjustment on the top bracket.

Those Headman header brackets appear to move the alternator over an inch or so. Is this correct? I haven't tore anything down but was sort of mocking the bracket location up and noticed the difference.

This got me to thinking about an alternative, I used to have a 74 Nova with a 350 and thought maybe I should look for that style of bracket and move the mounting location of the alternator to the passenger side. Am I opening a can of worms if I go that route?

Am I over thinking this or once I tear into it will the Headman brackets line everything up in the OEM exhuast mounting point locations? I just don't want to cut my exhaust and then have the truck down while I search for a fix.

Thanks in advance,
Mark