Are these worth buying?

[1LIME69]

Wanting to know if anyone has purchased these mounts from POL? Ill be running a big block with 2" headers so Ill need all the clearance I can get. Also I have seen that when running a big block the trans crossmember is supposed to be raised 3/8" more than with a small block but from the looks of this pic the trans crossmember only bolts to the frame in one position. Does anyone have any help for the new guy? Sorry couldn't get the tranny mount pic on here file was too big. By the way does anyone know how I can make a picture file size smaller.