280zforce, i was talking about the whole engine not just the holset, i have put much thought into using the hy35 with the l28 but after seeing a duramax truck run 7.8 i got to thinking.
dr_hunt, i have 1/8th inch thick steel subframe connectors and an 8 point roll cage. structurally i think i'd be alright but as far as brakes and handling go i think i would be pretty screwed. thanks for the input guys i think i've decided to stick with the L28et swap.