gt40p heads, direct bolt on?

I have been looking at getting gt40p heads on ebay. They seem to be a good price. Now do they just bolt on, or is there something else i would need to do to them? Change anything? I am also getting ready to put on a edelbrock performer intake upper/lower with a 70mm throttle body. Would they go good together? I dont want to spend the money on more expensive heads. They are worth more then my car With that being done and full exhaust which is also sitting in my basement, what kind of time do you think my car would run? 14.1 now with only cold air intake and pullys. So after the intake manifold,headers,h pipe throttle body and heads. Im sure lots of people here have similer setups, post those times