Look at the pictures. The exhaust face flange extends all the way to the upper corner of the casting on the TF heads, its cast in on the china head. The area between the outer most rocker stands and the valve cover rail is solid on the TF head, and void on the china heads. There are plenty of other differences when you compare the pics.
Those china heads are just Edelbrock knock offs used by many.
Procomp / Speedmaster
CPPA
Sidewinder
BPE
AirWolf
ProMaxx
to name a handful
View attachment 1715109317 TF head
View attachment 1715109318 china head
