340 with edelbrock heads overheating

I'm running hot as well. I "think" my issue is coolant flow. My crank pulley diameter is small because that was the only one I could come up with that was the right height (if thats the correct description) to line up with the other pulleys. The damper I bought (on the advice to run the best one I could afford) is thicker than original, which I didn't think of, I went with what they said "fits small block mopar" . I did at least learn through this whole process that "fits" probably means- fits but requires many other modifications.
I could move the Alternator out, but then the W/P doesn't line up, if I space the W/P pulley out, then the fan gets too close to the Rad. etc,etc.
PS, Does anybody know a good source of mopar crank pulleys with different heights and diameters? Or smaller diameter W/P pulleys?