360 running hot

I was at 3k because that motor runs so sweet there. I'll drop the initial to 12 and see what happens. The car feels really good at around 70+> The gears are 3:23s and it has a 727 right now. 4spd going in this winter I hope. The radiator is a 22" 2 core, a little small I know. I had the original cam reground at Bullet Racing cams. I gave him all the specs and told him it was a cruiser. It does have some top end. I've been ironing out the bugs and this cropped up. I'm hoping I can get by with this radiator. I'll try this tomorrow and see what happens. I do have a IR gun and have checked it a few times. It never ran this hot before.