Is this upgrade a good buy (taking into account 30.00 to have assembly balanced) t3/t4 upgrade ebay item #item360081696914 my turbo is currently a t3 with a stage 3 exhaust housing 63/60-1. the reason i am asking is because i need a new backing plate(i accidently damaged it dont ask) turbo was recently rebuilt. here is the specs on the ebay items (i confirmed all are garret parts). my hp goals on a b16 with a max of 12 lbs is 280 hp.

1- 60 a/r compressor housing
compressor whell inducer size 2.03
compressor exd size 2.75
49lb/min flow rate
housing 3" inlet 2" outlet