Would this turbo be too big for a mildish slant six setup?

[Rockerdude]

Been looking around for a good shape used grand national turbo, but found this on eBay.

http://www.ebay.com/itm/CXRacing-T3...Parts_Accessories&hash=item20bdd9f3ad&vxp=mtr
http://www.ebay.com/itm/180963287474?redirect=mobile