Has anyone done one of these without the proper tools? I heard that you have to heat up the head in the oven? I tried BFH'ing the thing, but its in there damn tight. Any suggestions would be appreciated

 

when i had my warrior i just took the head itself in and had them do it it was like a 100. dollars i was told i over payed but matbe u can do it yourself i do all my real build myself but leave the valve work to the shops