How much initial timing is too much? Running hot on the highway.

Car has 3.89 gears and a 727 so it cruises at 3500 rpm at 60-65 mph. The last time I had it on the highway, I was still running the 22" stock 318 radiator and the 7 blade factory fan (no clutch).

The shroud is going to have to come off now. I see what y'all are talking about. It's a handy place to mount the fans though, so I might just skeleton cut that sucker and still use it for fan mounting. I had a bad experience before mounting the fans directly to the core using those plastic push through mounts and will not use them ever again.

I've seen the Contour fan setup before, how thick are they at the middle, where the water pump pulley is? I have severely limited room in that area.