the eventual plan is to put on sidepipes, but at the rate I'm making other improvements I'll never be able to save up $1250 to spend all at once.
The quick and easy solution to the cast iron manifolds are a set of "tight fit headers" from Speedway Motors. They're only $60 for 1.5" primary and $90 for 1 5/8" primary and appear to replace the manifold almost perfectly.
I was looking at the same thing, but I am going to try to find a ceramic coated set with 1 5/8" primaries as I've already modded the motor a bit. I'll let ya know if I can fidn anything. Those look pretty good for that price btw!