Trick Flow small block heads

If it wasnt for this label on the box i would have had the box opened sooner but i want to make sure I did not get cancer from it....

the 10 small blocks are the same length...their are two longer studs then the eddy heads ...and the 3 other long stubs appear to longer also...i have pictures with the studs but due to time contraints I did not measure the eddy arp studs..

20190424_173331_resized_1.jpg

20190424_173252_resized_1.jpg

20190424_173554_resized_1.jpg

20190424_173431_resized_1.jpg