Do the heads off a 2000 7.4 (454) interchange with early style big block heads?

 

im almost positive they will not, but i can't say that i've tried it

 

that year they are vortec heads so if you matched up the intake you could probably get them to fit. If their like the SBC vortec which you can swap on any but the intake also has to be vortec to match and work. I think.