flyingfitz is quite on the money. When we install , at work, a newly rebuilt motor you must bleed the air pocket out of the head. 350 chevys you just leave off the theremostat housing & fill to there , 6cyl jeeps have have a heat temp sensor you leave out till it spews, fords are a heater hose fitting...... If you didnt bleed you could have really warped the head on the first fire up.
Also have you replaced the head gasket with all this torqing & retorking. They're pretty well made to bolt down once, with clean prepped surfaces. If you get oilly af on the gasket your pretty well fighting a lost battle in my expierience . I have reused before but you pull the gasket clear out, carb clean surfaces & the gasket, then coppercoat the hell out it on both, or all 6 sides if its the 3 layer . & I would only recommend this on MLS/steel or copper that aint been run long